AeroPress Replacement Rubber Gasket
Replacement silicone seal compatible with both the AeroPress Original and the AeroPress Go coffee makers. The spare seal can easily be replaced on the end of your existing AeroPress Original or AeroPress Go plunger.
Seal Care & Cleaning Instructions:
Care:  The seal does wear down over time. To maximize seal life, always eject  the used coffee right after brewing and store your AeroPress coffee  maker with the seal pushed all the way through the chamber. This keeps  the seal free of compression for longer seal life. There is no adhesive  on the seal, so you can easily remove it and then replace it on the  AeroPress plunger.
Cleaning: We recommend  occasionally removing the seal from the end of the plunger for a good  washing inside and out with warm water and dish soap.