A Good Bong is MJ Arsenal's collaboration with A Good Witch — a borosilicate piece built around a witch hat percolator and an ice catcher. It runs a 14mm joint, ships with a flower bowl in the box, and costs $89 direct from MJ Arsenal.
The Perc Is The Whole Idea
The witch hat percolator is the piece's signature. Water gets pulled through an intricate pathway on its way up the neck, so the theme is doing real diffusion work rather than sitting there as decoration — the difference between a novelty bong and a collab worth shelf space.
Above it sits an ice catcher. Load it and the smoke gets a second round of cooling after the water, which is what makes a 10-inch piece pull as smooth as something taller.
Best for the smoker who wants a daily-driver bong that isn't visually boring. It's not a heady collector's piece and it isn't trying to be — it's production glass with a real design point of view and enough function to justify reaching for it every night.
Who Built It
MJ Arsenal made its name on mini rigs — the Hydros, the Atlas, the rest of that line — and carries the same borosilicate build into its full-size flower glass like the Cache and the Palisade. A Good Witch brought the aesthetic.
Build And Size
It's 100% borosilicate glass and measures 10 by 5 inches — big enough to hold water volume, small enough to live on a shelf without dominating it. The joint is 14mm, the most common size in glass, so bowls and ash catchers are easy to source.
Specs: 100% borosilicate glass · 10 by 5 inches · 14mm joint · witch hat percolator · ice catcher · ships with a 14mm flower bowl.
What It Costs
MJ Arsenal sells A Good Bong for $89 with the 14mm flower bowl included, so there's no separate bowl purchase to budget for. That puts a named collaboration with a working perc and an ice catcher under the price of a lot of plain shop glass.
Keeping It Clean
Borosilicate takes isopropyl alcohol without complaint, and the care instruction is straightforward: soak the glass in iso, then rinse every part thoroughly before the next session. The witch hat perc has more internal surface than a plain downstem, so it wants a regular soak rather than an occasional one.
Where To Look Next
If the witch hat perc is what sold you, the wider brand directory and the product library cover who else builds themed pieces that still function.