Mr. B Concave Bubble Cap

$19.32 ~~$28~~ In stock

Concave bubble caps with clean lathed double maria handles offer the functionality of a bubble with a unique profile. Best for 25-30mm bangers.

Made in North Carolina

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 3 reviews)

Andrew ★★★★★ Oct 22, 2026

The double maria handles are perfectly sized for my fingers, making it easy to spin without dropping. My terp pearls move smoothly across the concave surface of my 25mm banger.

Nicholas A. ★★★★★ Oct 21, 2026

Finally, a bubble cap that actually stays put on my 25mm banger. The concave shape creates a perfect seal and the airflow is noticeably smoother than with my old flat cap. Really glad I picked this up.

Sophia J. ★★★★★ Oct 21, 2026

The double maria handles give me a solid grip even when the glass is hot, and it sits perfectly flush on my 25mm banger. Works great for smooth, low-temp dabs without any splash.