GRAV Slush Cup Pocket Bubbler – 4.5" Mini Bubbler, 10mm

The GRAV Slush Cup Pocket Bubbler is a 4.5" borosilicate mini bubbler — the smaller, thicker-walled version of GRAV's full-size Slush Cup. Its defining feature sits at the bottom: the percolator is positioned near the very base of the chamber, so smoke travels through the maximum possible column of water before it reaches you. An angled mouthpiece makes splashback effectively impossible, and a thick mouthpiece with reinforced walls makes the GRAV Slush Cup Pocket Bubbler one of the densest pieces GRAV produce for its size. It uses a 10mm female joint and ships with a GRAV 10mm Cup Bowl.

⚡ At-a-Glance Decision Summary

• What it is: A 4.5" borosilicate pocket bubbler shaped like a slush cup, with a bottom-mounted percolator.
• Why choose it: The perc sits at the very bottom of the chamber, which gives a piece this small a genuinely long water path and a hit heavier than its size suggests.
• The differentiator: Density. Thick mouthpiece, reinforced walls, roughly 110g at 4.5" — GRAV call it one of the densest pieces in their lineup.
• Splashback: The angled mouthpiece makes it very difficult to get water to your lips. GRAV's own line is that you would have to really try.
• Joint: 10mm female with a Dewar seal, so the bowl seats flush rather than perching.
• Included: A GRAV 10mm Cup Bowl — and Angies Boutique stocks that exact bowl separately.
• Colourways: Smoke, Light Cobalt, Amber and Lake Green, all at $59.99, matching GRAV exactly.
• Not the full-size Slush Cup. That is a separate, larger 14mm piece. See the note below.

Summary: The GRAV Slush Cup Pocket Bubbler is a 4.5" mini bubbler with a bottom-mounted perc, an anti-splash angled mouthpiece and a 10mm joint.

🧠 Our Verdict

Buy the GRAV Slush Cup Pocket Bubbler if you want the heaviest hit available from a pocket-sized piece — putting the perc at the bottom of the chamber is what lets 4.5 inches of glass punch well above its size.

Quick Summary

The GRAV Slush Cup Pocket Bubbler stands 4.5" tall on a 1.625" base — a scaled-down, thicker-walled take on GRAV's full-size Slush Cup. The percolator sits near the bottom of the chamber so smoke passes through as much water as the format allows, filling the small chamber with dense, flavour-preserving clouds. An angled mouthpiece prevents splashback and reinforced walls make it unusually heavy for its size. The GRAV Slush Cup Pocket Bubbler uses a 10mm female Dewar-seal joint and includes a GRAV 10mm Cup Bowl. Price: $59.99.

GRAV Slush Cup Pocket Bubbler – A Bottom-Mounted Perc in a 4.5" Body

First, the thing to get right before you buy. GRAV make two Slush Cups. The full-size GRAV Slush Cup is a larger piece on a 14mm joint. This is the Pocket Bubbler — smaller, thicker-walled, and on a 10mm joint. GRAV describe it in their own words as "a smaller, thicker glass version of the original Slush Cup Bubbler." Bowls do not swap between the two, so check which one you own before buying accessories.

Now the design. Most small bubblers put the percolator wherever it fits, and the consequence is a short water path and a thin hit. The GRAV Slush Cup Pocket Bubbler places its perc near the very bottom of the chamber. That single decision is what makes the piece work: smoke enters at the lowest point and travels up through the entire water column before it reaches the neck. On a 4.5" piece that is the longest path physically available, and it is why the first hit surprises people. The chamber fills with dense, milky smoke that holds the flavour of the flower rather than thinning it out. GRAV's wider pocket bubbler family sits in our GRAV collection.

The second design decision is the angled mouthpiece. Angling the neck away from the water means there is no straight path from the chamber to your lips, and GRAV are confident enough about it to say you would have to really try to get any splashback at all.

The third is weight. GRAV built the GRAV Slush Cup Pocket Bubbler with a thick glass mouthpiece and reinforced walls specifically because small glass gets treated carelessly. At roughly 110 grams for 4.5 inches it is, by GRAV's own account, one of the densest pieces in their lineup. It feels like a much larger piece in the hand.

Summary: The GRAV Slush Cup Pocket Bubbler combines a bottom-mounted perc, an angled anti-splash mouthpiece and unusually thick glass at 4.5 inches.

⭐ Who This Product Is For / Not For

Ideal for:

• Anyone who found pocket bubblers too weak. The bottom-mounted perc gives the GRAV Slush Cup Pocket Bubbler a heavier hit than the format usually allows.
• Travel and bag carry. 4.5" with reinforced walls and a thick mouthpiece — built to survive being knocked about.
• People who have been splashed. The angled mouthpiece is specifically engineered against it.
• Flavour-focused smokers. A small chamber filling with dense smoke preserves terpene character rather than diluting it.
• Anyone who owns 10mm bowls. Bowls swap freely across GRAV's whole pocket bubbler range.
• Buyers who want colour. Four colourways stocked — Smoke, Light Cobalt, Amber and Lake Green.

Not recommended for:

• Anyone wanting the full-size Slush Cup. That is a different, larger 14mm product.
• Group sessions. A pocket chamber is a personal size. The full-size GRAV Slush Cup is the sharing version.
• 14mm accessory owners. This joint is 10mm and nothing larger fits.
• Anyone who wants the lightest possible carry. The reinforced walls are a durability feature, and they add weight — the GRAV Spherical Pocket Bubbler at 3" is the smaller, lighter option.
• People who dislike frequent water changes. A small chamber holds little water and it needs replacing every session or two.

Summary: The GRAV Slush Cup Pocket Bubbler suits solo, portable, hit-heavy use on 10mm hardware and does not suit sharing or 14mm accessories.

⚠️ Known Limitations

• It is not the full-size Slush Cup. The two are different products at different joint sizes, and this is the single most common confusion.
• Small water volume. The bottom-mounted perc uses the water well, but there is not much of it. Change it every session or two.
• 10mm only. The smallest common joint size, so the accessory pool is narrower than 14mm.
• GRAV do not publish a banger angle for this piece. They specify one for the Spherical (45°) and the Hourglass (90°) but not for the Slush Cup Pocket Bubbler. Check your joint before buying quartz — see Compatibility.
• Heavier than it looks. The reinforced walls are deliberate, but roughly 110g in a 4.5" piece is dense. That is durability, and it is also weight in a pocket.
• No Clear in stock here. GRAV produce six colourways including Clear at a lower price; Angies Boutique stocks the four coloured versions.
• The perc is fixed. Nothing on the GRAV Slush Cup Pocket Bubbler comes apart except the bowl, so cleaning is a soaking job.

Summary: The GRAV Slush Cup Pocket Bubbler is a 10mm pocket piece, not the 14mm full-size Slush Cup, and its banger angle is unpublished.

⚙️ Features & Benefits

• Bottom-mounted percolator: The defining feature. Positioning the perc near the base of the chamber gives smoke the longest water path the format allows, which is why the GRAV Slush Cup Pocket Bubbler hits heavier than its size suggests.
• Angled mouthpiece: Removes any straight path from water to lips. GRAV's position is that splashback is effectively unachievable.
• Thick glass mouthpiece: The part most likely to chip on a small piece, deliberately overbuilt.
• Reinforced walls: Roughly 110g at 4.5" — one of the densest pieces GRAV make relative to size.
• Dewar-seal joint: The bowl seats flush into the joint rather than perching on top of it.
• Dense, milky chamber fill: A small chamber saturating quickly preserves flavour rather than diluting it across a large volume.
• 10mm female joint: Takes the included Cup Bowl, a 10mm male banger, or a pre-roll.
• GRAV 10mm Cup Bowl included: The standard slide across GRAV's pocket range, and stocked separately here.
• Four colourways: Smoke, Light Cobalt, Amber and Lake Green.

Summary: A bottom-mounted perc, an angled mouthpiece and reinforced walls define the GRAV Slush Cup Pocket Bubbler.

📐 Structured Specs

Summary: The GRAV Slush Cup Pocket Bubbler measures 4.5" with a 10mm Dewar-seal joint and a bottom-mounted percolator.

🔌 Compatibility & Requirements

Compatible with:

• Any 10mm male bowl. The included Cup Bowl is the intended slide — the GRAV Cup Bowl is stocked in 10mm as a direct replacement.
• Bowls from GRAV's other pocket bubblers. The Spherical, Hourglass, Coffee Mug and Conical Pocket Bubblers all use 10mm, so slides move freely between them.
• Pre-rolled joints and blunts seated directly in the 10mm joint.
• Isopropyl alcohol and coarse salt. Dr. Dabber ISO Snaps handle the bowl between soaks.

Quartz — check the angle first. GRAV publish a banger angle for their other pocket bubblers but not for this one: the Spherical takes 45° and the Hourglass takes 90°. Both angles are stocked at Angies Boutique — the GRAV Quartz Bucket in 10mm 45°, and the GRAV Quartz Control Tower Banger Set and GRAV Quartz Slurper Bucket Set in 10mm 90°. Match the banger to the angle of your joint rather than assuming, and call the shop if you want it checked against the piece in hand.

NOT compatible with:

• 14mm and 19mm accessories. The joint on the GRAV Slush Cup Pocket Bubbler is 10mm. This includes bowls for the full-size Slush Cup, which is 14mm.
• Female-joint accessories. The joint is female, so the bowl or banger must be male.
• Replacement percolators or downstems. The perc is fused into the chamber.
• Ice. No pinch and no room.
• Dishwashers and boiling water. Neither is safe for this glass.

Summary: The GRAV Slush Cup Pocket Bubbler takes 10mm male bowls, and its banger angle should be checked rather than assumed.

🧼 How to Use & Troubleshooting

Setting up the GRAV Slush Cup Pocket Bubbler:

1. Rinse with warm water before first use.
2. Add water through the mouthpiece until the perc at the bottom of the chamber is comfortably covered. Because the perc sits low, this is a smaller pour than the chamber size suggests — err low.
3. Seat the included 10mm Cup Bowl. The Dewar seal means it should drop in flush rather than sitting proud.
4. Pack the bowl lightly. The chamber saturates quickly by design.
5. Draw steadily and watch the chamber cloud over. Pull the bowl to clear.
6. Hold the GRAV Slush Cup Pocket Bubbler around the cup body — the widest and most secure point.

Running concentrate: Remove the Cup Bowl and seat a 10mm male quartz banger matching your joint angle. Heat, let it cool to temperature, apply concentrate, and cap. The bottom-mounted perc cools vapour well for a piece this size.

Troubleshooting:

• Problem: harsh, no bubbling. Solution: the water is below the perc. Because the perc sits at the very bottom, it takes surprisingly little water to cover — but below that line the smoke bypasses it entirely.
• Problem: water reaching the mouthpiece. Solution: overfilled. Pour some out. The angled mouthpiece handles normal use, not an over-filled chamber.
• Problem: heavy drag. Solution: either too much water, or resin in the perc slits. Empty, refill low, and soak if it persists.
• Problem: the bowl sits proud instead of flush. Solution: resin in the Dewar seal. Clean the joint — a flush seat is how it is meant to sit.
• Problem: stale taste. Solution: change the water. A small chamber holds little of it.
• Problem: cloudy glass. Solution: soak in isopropyl and coarse salt, cover both openings, shake, and let it sit. Repeat soaks work better than force on a fixed perc.

For a broader walk-through of how to judge glass thickness, joint sizing and perc placement before buying, read our guide on how to select the best products from a premium smoke shop.

Summary: Fill the GRAV Slush Cup Pocket Bubbler just above the bottom perc, seat the bowl flush, and clean by soaking.

⚖️ Comparison Table

How to read this table. Every pocket bubbler here shares a 10mm joint, so bowls swap freely — the difference is where the filtration happens. The GRAV Slush Cup Pocket Bubbler puts its perc at the very bottom, which buys the longest water path and the heaviest hit of the group. The Hourglass runs a diffused downstem and the longest stem, which makes it the driest. The Spherical has no perc at all and is the smallest and simplest. The full-size Slush Cup is a different product on a 14mm joint and is listed here only so the two are not confused.

Summary: Among GRAV's pocket bubblers the GRAV Slush Cup Pocket Bubbler is the one built for the heaviest hit.

💬 Common Questions & Answers

Is this the same as the full-size Slush Cup?
No. GRAV make two, and they are different products. The full-size GRAV Slush Cup is a larger piece on a 14mm joint at $105.99. The GRAV Slush Cup Pocket Bubbler is the compact version on a 10mm joint at $59.99, and GRAV describe it in their own words as "a smaller, thicker glass version of the original Slush Cup Bubbler." Bowls and bangers do not swap between them because of the joint difference, so check which one you own before buying any accessory.

Why does it hit harder than other pocket bubblers?
Because of where the percolator sits. Most small bubblers place the perc wherever the shape allows, which usually means partway up the chamber and a short water path. The GRAV Slush Cup Pocket Bubbler puts its perc near the very bottom, so smoke enters at the lowest point and rises through the entire water column. On a 4.5-inch piece that is the longest path physically available, and it is why the chamber fills with dense, milky smoke rather than a thin wisp.

Will I get splashed?
Very unlikely. The mouthpiece is angled specifically so there is no straight path from the water to your lips, and GRAV are confident enough about it to say you would have to really try to get any splashback at all. The one thing that defeats it is overfilling: the angle handles normal use, not a chamber filled past the design level. Fill the GRAV Slush Cup Pocket Bubbler just above the bottom perc and no higher.

Is it fragile at this size?
Less than you would expect, and deliberately so. GRAV built the GRAV Slush Cup Pocket Bubbler with a thick glass mouthpiece — the part most likely to chip on a small piece — and reinforced walls throughout, on the reasoning that small glass gets treated carelessly. At roughly 110 grams for 4.5 inches, GRAV describe it as one of the densest pieces in their entire lineup. It feels considerably more substantial in the hand than the dimensions suggest.

What quartz banger fits it?
A 10mm male banger — but check the angle rather than assuming. GRAV publish an angle for their other pocket bubblers (the Spherical takes 45°, the Hourglass takes 90°) but do not publish one for the Slush Cup Pocket Bubbler. Angies Boutique stocks both: the GRAV Quartz Bucket in 10mm 45°, and the Control Tower and Slurper sets in 10mm 90°. Match the banger to your joint, or call the shop and we will check it against the piece.

What is a Dewar seal?
It is a joint design where the female fitting is recessed so the bowl drops in and seats flush with the top of the piece, rather than perching on a raised collar. On the GRAV Slush Cup Pocket Bubbler that keeps the profile clean and gives the bowl a positive, stable seat. If your bowl starts sitting proud instead of flush, that is resin building up in the joint rather than a fault — clean the seal and it will drop back in.

Which colours are available?
Angies Boutique stocks four: Smoke, Light Cobalt, Amber and Lake Green, all at $59.99, which matches GRAV's own price for the coloured versions exactly. GRAV produce six in total — the other two are Clear and Pink, and Clear sits at a lower price point on their site. All four stocked colourways are the same piece with the same specification; the only difference is the glass colour.

Summary: The GRAV Slush Cup Pocket Bubbler is the 10mm pocket version, hits hard because of its bottom-mounted perc, and comes in four colourways.

🛒 Complete Your Pocket Setup

• A spare bowl: the GRAV Cup Bowl in 10mm — the exact slide in the box, at $9.99.
• Turn it into a mini dab rig: the GRAV Quartz Bucket in 10mm 45°, or the GRAV Quartz Control Tower Banger Set in 10mm 90° — match your joint angle.
• Cleaning: Dr. Dabber ISO Snaps, sized for this scale of glass.
• The driest pocket bubbler: the GRAV Hourglass Pocket Bubbler, with a long anti-splash stem.
• The smallest: the GRAV Spherical Pocket Bubbler at 3".
• The full-size version: the GRAV Slush Cup on a 14mm joint.

Browse the wider ranges in Bubblers and Glass Pipes.

Summary: Pair the GRAV Slush Cup Pocket Bubbler with a spare 10mm Cup Bowl, a matching 10mm banger, and isopropyl cleaning supplies.

✅ Authentic & Ready to Ship

The GRAV Slush Cup Pocket Bubbler sold here is authentic GRAV glass. Angies Boutique buys direct from GRAV as an authorized dealer, so every piece arrives as GRAV packed it, with the 10mm Cup Bowl included.

All four colourways are $59.99 — the same price GRAV charge on their own site. In stock and ready to ship, or collect it the same day in person at 838 N Broadway, Los Angeles, CA 90012.

Summary: The GRAV Slush Cup Pocket Bubbler is authentic, in stock at $59.99, and available for same-day pickup in Los Angeles.