Zojirushi Stopper Gasket

This gasket is designed specifically for models SD-CS50, SJ-JS10, and the SM-LA, SM-LB, SM-QHE, SM-TA, and SM-TAE series. You can verify your model number, usually found on the bottom of your bottle or near the lid assembly, to ensure it matches these series.

Installing the gasket is straightforward. Simply remove the old, worn gasket from the stopper assembly and press the new one firmly into the groove, ensuring it sits flush and even all the way around to maintain a proper seal.

Over time, silicone gaskets can lose their elasticity, become brittle, or develop microscopic tears that compromise the leak-proof seal of your bottle. Replacing the gasket periodically ensures your beverage stays contained and your bottle performs as intended.

No, this item is specifically the replacement gasket ring only. It is intended to replace a worn or damaged seal on your existing stopper assembly, not the entire lid mechanism.

There is no set expiration date, but you should inspect your gasket regularly. If you notice leaks, visible cracks, or if the silicone feels sticky or stretched out, it is time to replace it to prevent spills.