High Density Polypropylene. Screw On, Spill-Resistant Flip-Top Lid. Measurement Scale In Ounces And Milliliters Makes Tracking Liquid Intake Easy. Removable Strainer with Blades and Strain Allows Chopping and Mixing at the Same Time. Tight Locking Lid and Cap. Leak-Proof. Wide Opening Makes It Easy To Add Ice, Fruit or Mixes. Meets FDA Requirements. BPA Free. Hand Wash Recommended.