By making use of atmospheric pressure, it seals your cup by just a place-on-top action. Keeping your cup of drink hygienic. Made of fine silicone. Approximately 4" x 4.25"
By making use of atmospheric pressure, it seals your cup by just a place-on-top action. Keeping your cup of drink hygienic. Made of fine silicone. Approximately 4" x 4.25"
