（会員限定）CAST キャニスター 60mm シリコーンパッキン

The silicone packing fits snugly into the lid groove and the seal feels much firmer than the worn-out original. My coffee beans have stayed noticeably fresher since swapping it in.

Finally got around to replacing the old seal and the fit is perfectly snug again. The silicone has a nice, dense feel that should last a long time. My coffee stays noticeably fresher now.

The silicone is just flexible enough to seat perfectly without any wrestling, and my coffee beans have stayed noticeably crunchier since I swapped it in. Wasn't sure a tiny rubber ring would make this much difference, but the seal feels airtight every time I snap the lid down.