アクティブタンブラー 600ml / 800ml シリコーンパッキン

The replacement packing fits perfectly into my 800ml tumbler and the silicone feels more flexible than the original, creating a tighter seal when I shake my morning iced coffee. I've noticed zero condensation or leaking after a week of daily use, which was my main concern.

I needed a fresh seal because my old one started letting coffee drip out of the lid, and this replacement fits perfectly with no gaps. The silicone feels slightly firmer than the original, which actually makes the lid snap on more securely.

After almost a year of daily use, the original seal had gotten loose and leaky, so I was relieved to find this exact replacement. The silicone is firm but flexible enough to snap back into the lid without any wrestling, and my 800ml tumbler is fully leakproof again.