Glass Diamond Top Caps by Terporium


(13 customer reviews)

Revolutionize your setup with these heady glass diamond top caps. We love these caps as the smooth tapered tip allows the diamond tops to seal bangers of all sizes with ease. Made out of solid glass, our diamond top caps are available in Clear, Light Blue, Green, Red, Purple, and Pink. The diamond caps are available in both 20mm and 30mm diameters to allow you to find your perfect fit.


  • 30mm: Compatible with bangers with a top diameter between 18mm-30mm (Auto-Spinners, Terp Slurpers, Samurai Blenders, etc)
  • 20mm: Compatible with bangers with a top diameter between 16mm-20mm (Terp Tube, Terp Slurpers, etc)
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The diamond is made out of solid glass, meaning it does not provide airflow. As such, it is best when used with terp slurpers, auto-spinners, samurais/blenders, or any other banger that has its own airflow.

Available in Two Sizes: 

  • 30mm: Compatible with bangers with a top diameter between 18mm-30mm (Auto-Spinners, Terp Slurpers, Samurai Blenders, etc)
  • 20mm: Compatible with bangers with a top diameter between 16mm-20mm (Terp Tube, Terp Slurpers, etc)


Note: Banger not included, used to show fitment.


Wipe with alcohol if sticky.

WARNING: Do not submerge hot terp pearls, marbles, or pillars into a cold solvent (eg. isopropyl alcohol) as the glass crack due to thermal shock. Wait for the terp slurper set to cool a minute before submerging or clean with a dry cotton swab. We are not responsible for items damaged due to not following cleaning procedures.


Free shipping on all US orders. All orders will be shipped within 1-2 business days in discrete packaging. You will receive a shipment confirmation email once your order has shipped containing your tracking number(s). If you need to cancel your order or change your shipping information, please contact us at immediately as orders are processed quickly.


If you are not satisfied with a Terporium product you have 30 days to return an item from the date you received it. You will be responsible for paying for return shipping. To be eligible for a return, your item must be unused and in the same condition that you received it. You must return your item in the original packaging. If your order arrives damaged, defective, missing, or incorrect, we will email you a return label free of charge.

13 reviews for Glass Diamond Top Caps by Terporium

  1. Slightweez (verified owner)

    These are absolutely gorgeous and offer a great seal (not perfect all the time, slight adjustment might need to be made mid-dab) I have 3 of them now and my favorite is the clear one, just really looks so clean and perfectly faceted.

  2. zachcrolley (verified owner)

    Awesome product!

  3. Gregory Collins (verified owner)

    I bought a 20mm and a 30mm during 4/20 BOGO sale.

    The 20mm works great with my Terp Tube auto spinner. I love it.

    I got the 30mm to used with an Opaque Bottom Auto Spinner. It doesn’t make a strong enough seal to spin pearls at all. Get a marble instead.

  4. Dudologist (verified owner)

    This one works great on my terptubes! A1

  5. Dudologist (verified owner)

    Had to get the pink one for my wife also!

  6. 6u66akush (verified owner)

    If you have a problem with dopping marbles this is your answer!

  7. 6u66akush (verified owner)

    I got the 30mm recently and it’s much bigger than I thought it would be! I recommend 25mm or bigger ID on your banger!

  8. s359284 (verified owner)

    I own a few, just for the sake of color variety. They definitely give your rig a different look, and I had no difficulty getting them to spin with my auto’s, blenders and slurpers.

  9. (verified owner)

    Looks cool and it works but i prefer the ball top caps to completely inclose the top, if this is off a little bit it can mess with the airflow

  10. zkb0586 (verified owner)

    I think I might have to get another color. This little thing is really cool

  11. adamsmith0211 (verified owner)

    Works great with my tower slurper! Sturdy, feels like it wont break if dropped.

  12. wendy.essj (verified owner)

    Good mix of airflow and air restriction looks nice too

  13. Tiffany Sandidge (verified owner)

    Nice little cap. Not a perfect seal but it has its uses

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