Collegiate Trek Tumbler Book Club Premium Copper Coated Insulation Layer:

Premium Copper Coated Insulation Layer: The exterior of the inner wall

It features a sturdy leak-proof cap that pops open with the press of a button

Multi-Use Leakproof Lid: Featuring two interchangeable leakproof lid pieces

and is perfect for kids and adults alike

Leak Proof Straw Lid: Our BPA-free Summit Straw Lid is leak-proof when the nozzle is in the closed position

Collegiate Trek Tumbler Book Club Premium Copper Coated Insulation Layer:Cupholder Friendly: Tapered shape makes it the ideal cup Take Us With You wherever you go. Leakproof: Comes with flip lid to prevent spills. Also includes two straws. Double Wall Insulation: Keeps beverages hot or cold for hours. Durable: Made of premium 18 8 stainless steel. Pat Pat Pend.