Q: Why is a tight seal on my top cap or marble so important?

If your top accessory doesn’t create a perfect, airtight seal on the rim, air leaks in from the top. This destroys the internal vacuum of the banger, meaning you won’t get enough airflow velocity pulling through the bottom intakes to make your internal pillars jump and rotate properly. A flush, solid seal ensures maximum performance and thicker clouds.

Question 1

What is the difference between a marble and a top cap?

Accepted Answer

While they perform the exact same function, they differ in their shape, fit, and design:

Top Marbles: Classic, perfectly round solid glass/quartz spheres that sit directly on the top rim to seal the banger.
Top Caps: Caps designed with a specific top shape and an inject area that sits down inside the opening. This provides a great seal, but sizing must be considered as the inject portion needs to fit inside the banger.

Question 2

What is a top cap or marble, and why do I need one?

Accepted Answer

A top cap or top marble is a solid glass accessory that sits on your banger&#8217;s upper rim to completely block airflow and create a vacuum.
By sealing the top, air is forced through the banger&#8217;s bottom intake slits or wall holes instead. This creates the high-velocity vortex needed to spin your pearls, pillars, and concentrates for maximum vapor.

Question 3

How do I know what size marble or cap I need for my banger?

Accepted Answer

We list the exact top diameter on every single one of our banger listings to make sizing as easy as possible. When choosing your top accessory, keep these details in mind:

For Top Marbles: You just need a marble with a diameter wider than the top opening of your banger so it sits securely on the rim without slipping through. For example, a standard 20mm or 22mm opening pairs perfectly with an 18-20mm top marble.
For Top Caps: Because top caps are more specifically sized, you need to consider the inner diameter of your banger&#8217;s top opening. You have to ensure that the insert (the inject part) is small enough to fit down inside the tube while the upper lip seals the rim.

Tip: To skip the sizing guesswork entirely, grab one of our Banger Boxes—we pre-pack them with top accessories guaranteed to fit perfectly.

Question 4

What size marble or top cap do you recommend for Terp Slurpers, Towers, and Feeders?

Accepted Answer

It depends on the inner diameter (ID) of your banger, but overall, a 20mm marble fits all of our Terp Slurpers, Towers, and Feeders.
If you prefer a marble that is less likely to roll off with movement, an 18mm marble is a great option that works across both Terp Slurpers and Towers.

Question 5

What are the pros and cons of using a marble versus a top cap?

Accepted Answer

Both styles completely block top airflow to create a perfect vacuum, but they handle differently:

Top Marbles are highly durable and fit a much broader range of bangers, since a slightly larger or smaller marble will still seal the top rim. However, they can absorb heat and get hot to the touch, and they can roll off the top of the banger if the banger moves.
Top Caps use an inject part that sits inside the banger opening to keep them from accidentally falling off the top. They also feature a handle for easier handling and less heat transfer. However, sizing must be considered since the inject portion must fit inside your banger&#8217;s inner diameter.

Question 6

How do I clean my tops, marbles, and caps?

Accepted Answer

To clean your top accessories, use either of these quick methods:

The Cleaning Bin Method: Once your glass has cooled down to warm-to-the-touch, drop or dip it directly into isopropyl alcohol. Using a Banger Cleaning Bin with a strainer basket makes it easy to soak and retrieve all of your small accessories at once—just lift the basket out and dry them thoroughly before your next session.
The Paper Towel Method: Place your top accessory onto a paper towel and give it a quick wipe down. If it is sticky or dirty, add a splash of isopropyl alcohol to the paper towel to easily break down the remaining residue.

Question 7

Compatibility: How do I choose between a cap and a marble?

Accepted Answer

Choosing between the two comes down to your banger style and personal preference:

Top Marbles are highly versatile and fit easily on a wide range of banger styles like Terp Slurpers, Towers, and Auto Spinners. As long as the marble is wider than the top opening&#8217;s inner diameter, it will sit on the rim and create a seal.
Top Caps are more specifically sized and tailored for a precise style of banger (for example, a cap made specifically to fit the dimensions of a Control Tower versus a Terp Slurper, though some versatile designs can cross over and fit both).

Tip: Always check your specific banger’s product description for the inner and outer diameter measurements before buying a standalone cap!

Question 8

Why is a tight seal on my top cap or marble so important?

Accepted Answer

If your top accessory doesn&#8217;t create a perfect, airtight seal on the rim, air leaks in from the top. This destroys the internal vacuum of the banger, meaning you won&#8217;t get enough airflow velocity pulling through the bottom intakes to make your internal pillars jump and rotate properly. A flush, solid seal ensures maximum performance and thicker clouds.

Question 9

What is the difference between a top cap and a carb cap?

Accepted Answer

It all comes down to the style of banger you are using and how it manages airflow:

Top Marbles/Caps: These are solid glass spheres or tops designed specifically for Terp Slurpers, Towers, and Auto Spinners. Their job is to completely seal the top opening, forcing the air to pull exclusively through the banger&#8217;s bottom intake slits or angled wall holes.
Carb Caps: These are designed for Traditional Bucket Bangers. Unlike a solid marble, a carb cap features a built-in airway tube or nozzle that injects outside air directly into the bucket to move your concentrate around.

Question 10

Can I use a solid marble on a Traditional Bucket Banger?

Accepted Answer

No. Because a top marble is completely solid, putting it on a Traditional Bucket Banger will cut off 100% of the airflow, making it impossible to inhale any vapor.
The only exception is if you are using an Auto Spinner bucket—since Auto Spinners have airflow holes drilled directly into the sides of the quartz wall, they require a solid top marble to seal the rim and force the vortex action.

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