Compatible with: Currently compatible with Hydro Flask, Klean Kanteen, Nalgene, and Simple Modern Wide Mouth Water Bottles. NOTE: NOT compatible with Tal, Fnova, or FlaskCap BPA FREE: Our replacement lids is made of high-quality materials, durable and long-lasting. BPA free, Safe to Drink. Leak-proof: Food grade silicone sealing gasket attached to the flip makes the lid leak proof. Safe and secure for hot and cold beverages, perfect replacement lid for hydroflask wide mouth. Easy Flip & Sip: A practical and convenient one-button opening for one-handed operation, convenient to drink. The Wide Mouth Lid has flip-top opening with a rubber stopper to help prevent spills when not in use. It's non-original aftermarket part. The product is not sponsored or endorsed by ,or affiliated with the brands it fit ,including Hydro Flask, Klean Kanteen, Nalgene.