鋁製水瓶 Classic™ 瓶蓋用墊圈

Finally found these replacement gaskets after searching forever — they fit perfectly and the rubber feels more pliable than the original, so the seal is actually tighter now. My bottle's good as new.

Bought two of these as spares after my original gasket got stretched out. They pop into the classic cap easily and seal tight again with no drips. Nice to fix a bottle for a couple bucks instead of replacing the whole thing.

My old cap started leaking in my bag, and this little gasket fixed it right up. Snapped into the CLASSIC cap in seconds and the seal is tight again, no drips. Way cheaper than buying a whole new bottle.