Tokai バイオパイプフィルター（タバコ用）

The filter noticeably reduced the harshness on the first few drags, and my fingers didn't smell like an ashtray afterward. It's a small, well-made accessory that actually keeps the cigarette odor off your lips.

The tar staining on my fingers has completely stopped since I started using these, and the filter actually blocks the cigarette smell from sticking to my breath. They’re a bit snug to fit at first but work perfectly once inserted.

I was surprised how much less my lips darkened after just a week of using these filters, and the tar buildup in the pipe is noticeably reduced. The burn prevention feature is a nice bonus too.