Pigeon Mag Mag Straw Cup Spare Part - Gasket (2pc) x4Replacement part for Mag Mag Bottle Spare Parts Gasket Compatible with Mag Mag Sprout & Straw Cups Replacement gasket and Replacement Spout available for hygiene purposes Full replacement spare part set with straws and gaskets available No direct exposure to high temperature or sunlight How to set the product: Place the gasket in the adaptor. The gasket has a front and back. Set the gasket so that you can see the round marks. How to clean the product: