Smoke Trap ECO Replacement Filter Cartridges For + | Single Replacement Filter - Zero Plastic Waste Replacement Filter - Maximum Air Flow While Exhaling - Long Lasting 500+ Exhales (1)

Although the unit doesn’t have a cap it really isn’t necessary because of how effective it is. Doesn’t not clog up until it needs to be replaced. I’ll give it 4.5/5 which rounds up

Better than smoke buudddy and definitely last way longer thanks to proprietary property of this device great for smell the functionality is par one to none and the ease of use isbphephase the best things about this filter size lol

Brilliant invention in it's simplicity. It does capture smoke quite efficiently. I exhale into it and no smoke goes out whatsoever! I'm knocking a star for the design and advertising, it does capture the smoke well, but doesn't really help with keeping the room completely smoke free. Just keep in mind that if you're smoke a cigarette, it keeps burning while you hold it, and this device won't capture any of that, but it does reduce the overall amount of smoke. Best used with a bong!

Awesome product

It works!