2″ GLYCERIN CARB CAP

The 2" Glycerin Carb Cap by What You Need is a compact glass carb cap/flower bowl hybrid made for dabbers and bong heads who hate hot, harsh hits. Its glycerin-filled center is all about cooling things down fast, so you keep flavor without cooking your throat. At just 2 inches (51mm) long with a 14mm joint, it stays low-profile while still changing how your rig or tube feels.

Why It Hits Different

• Smoother, cooler pulls — The glycerin core absorbs heat quickly, so vapor or smoke feels way less aggressive.
• Helps your terps shine — Cooler temps mean you taste more of what you paid for, instead of just heat.
• Two jobs, one piece — Works as a carb cap and as a flower bowl, so you can switch between dabs and bowls without swapping a bunch of glass.
• Plays nice with 14mm setups — Designed for standard 14mm joints, making it an easy upgrade for most daily drivers.
• Compact and easy to handle — The 2" (51mm) size feels natural in the hand and doesn’t weigh your rig down.
• Pick your vibe — Multiple color options let you match your rig, mood, or that one lighter you never lend out.

Best For

This piece is made for dabbers who like low-temp style hits and bong smokers who want smoother flower sessions without switching to a huge, percy-style setup. It’s also a nice little upgrade if you’re dialing in a compact table setup with a simple tube, a couple of dab tools, and just want something that actually changes how your hits feel, not just how the shelf looks.

How to Use It

For dabs, use it like a standard carb cap: set it over your heated banger or nail so it helps trap heat and control airflow while the glycerin core works in the background to keep things from getting too hot. You’ll notice you can pull smoother and longer without that instant chest kick.

When you want flower, treat it like a normal 14mm bowl. Pack it, seat it in your joint, and use your rig or bong like usual — the cooled glass and compact shape help tame some of the heat, especially on smaller pieces. If you like to keep your station tight, park it on a dab mat between rips so you’re not chasing a hot, sticky piece across the table.

The Basics

The magic here is glycerin. It’s sealed inside the glass and stays cooler than the surrounding air and vapor for longer than plain glass alone. You’re not drinking it, you’re not touching it — it just sits inside the chamber and soaks up excess heat while you sesh.

Because it’s a 14mm piece, it slots right into most standard rigs and water pipes using that joint size. No weird adapters, no guessing. If your favorite piece is already rocking a 14mm joint and you want something that cools hits without adding bulky percs, this little carb cap/bowl combo is a clean solution.

Specifications

Fit & Compatibility

This glycerin carb cap is built around a 14mm joint, so it plays best with rigs and bongs that already use a 14mm female joint. If your piece uses a different size, you’ll need an adapter, but most modern tubes and rigs stick with 14mm, so odds are good it’ll drop right in.

As a carb cap, it’s meant for standard bangers and nails. If you’re building out a full dab station with multiple nails, spares, and maybe a couple of other carb caps, this one becomes your “cool hit” option when you don’t want to feel roasted.

Care & Cleaning

Let the glass cool completely before you do anything with it. Once it’s at room temp, wipe off surface residue or soak the glass portion in isopropyl alcohol, then rinse with water and let it dry before you use it again. Treat it like any other glass accessory — no boiling, no direct flame on cold glass, and don’t smack it around just because the glycerin makes it feel a little beefier.

FAQ

• Will this fit my rig or bong?
  If your piece has a 14mm joint, you’re good to go. This carb cap/flower bowl is built around a standard 14mm size, which is what most current rigs and smaller water pipes use.
• Can I use it for both dabs and flower?
  Yes. It’s designed to pull double duty as a carb cap for your banger and as a flower bowl on any 14mm piece, which is perfect if you like to switch between concentrates and flower without rebuilding your whole setup. If you bounce between this and more traditional flower hardware, you can always pair it with other 14mm smoke shop products for variety.
• Does the glycerin ever touch the smoke or vapor?
  No. The glycerin is sealed inside the glass. Your vapor or smoke travels through the open air path just like a normal bowl or carb cap — the glycerin just sits there and absorbs heat from the surrounding glass.
• Do I need to freeze or chill it for it to work?
  You don’t have to chill it for it to help with cooling — the glycerin will still absorb heat better than air. Some people like to cool these pieces down before a sesh, but if you do that, be gentle with temperature changes and don’t hit it with high heat right away.
• How should I clean around the glycerin section?
  Treat it like a normal glass accessory. Let it cool, then soak or wipe with isopropyl alcohol, rinse with water, and let it dry. Don’t try to open the glycerin chamber or use anything abrasive. For heavy concentrate use, keeping your tools and caps organized on a simple accessory tray or stand makes cleaning and swapping pieces a lot easier.
• Is this better than a regular glass carb cap?
  "Better" depends on what you like. If you’re chasing the coldest, smoothest pulls you can get without buying a whole new rig, the glycerin core is a clear upgrade over plain glass. If you just need something basic to plug a banger, a standard cap will do — this one shines when you care about comfort and flavor.
• What else should I pair this with?
  It’s a nice match with compact rigs or smaller bongs, especially if you like to keep your concentrates stored cleanly in proper storage and packaging instead of random silicone scraps or foil. Build a simple, tidy setup and this piece feels right at home.