NFL Trek Tumbler signature-trek Leak-Proof: The Flip Lid is

Leak-Proof: The Flip Lid is leakproof when the flap is closed

Easy to Use: Lid keeps heat inside your cup

Not intended for Hot Liquids: Pressure may build in the bottle causing leaks or spills

Instructions on how-to use the Simple Modern Cleaning Tablets can be found here

No Mess: Double wall technology prevents condensation sweat

NFL Trek Tumbler signature-trek Leak-Proof: The Flip Lid isCupholder Friendly: Tapered shape with handle makes it the ideal cup to take on the go. Leak Resistant Insulated Lid: Two straws included. Sweat Free Exterior: Double wall insulation prevents condensation and keeps beverages hot or cold for hours. Durable: Made without lead, BPA and Phthalate Pat Pat Pend.