Spill-Proof Lid: Silicone straw lid is designed to pevent spills (Not Intended for Hot or Carbonated Liquids) Compatibility: This reusable straw lid is designed to fit only threaded, stainless steel Simple Modern vessels in the 24oz Trek Collection and all sizes of the Classic Collection. This lid does not fit the Simple Modern Voyager, Cruiser, Slim Cruiser, or any other brand of drinkware. Dishwasher Safe: Clean in the top rack of your dishwasher. Designed ONLY for Simple Modern tumblers (tumbler sold separately). BPA Free: Our lids are food grade safe