（会員限定）デイオフタンブラー 900ml シリコーンパッキン

The 900ml capacity is perfect for long workdays—I fill it once in the morning and still have plenty left by the afternoon. The silicone packing keeps the lid snug without any annoying leaks, even when I toss it sideways in my bag.

I’ve been using this tumbler daily, and the 900ml size is just right for keeping me hydrated without constant refills. The silicone packing really does its job—no leaks even when I toss it in my bag.

The silicone seal on this tumbler is rock-solid; I tossed it sideways in my bag and not a single drop escaped. It’s a nice, generous 900ml size that actually gets me through the whole workday without needing a refill.