Cupholder Friendly: Tapered shape with handle makes it the ideal cup -- Take Us With You wherever you go.
Spill-Proof Silicone Straw Lid: Comes with a silicone straw lid to prevent spills. Lid is also compatible with Simple Modern Classic tumblers. 
Double Wall Insulation: Keeps beverages cold for hours.
Not Intended for Hot or Carbonated Liquids: Pressure may build in the tumbler causing leaks or spills.

Pat/Pat Pend.