1. EASY TO DRINK & CARRY - The sip lid allows for maximum water flow and easy one-handed drinking. Better sealing effect with screw cap, LEAKPROOF. Twist the lid so you can drink without removing the cap and seal the drink securely. 2. MULTI-COMPATIBLE WITH HYDROFLASK WIDE MOUTH - Fits sports water bottles like HYDRO FLASK with WIDE MOUTH 18 oz 32 oz, 40 oz and theoretically fits brands Mira, Takeya, Simply Modern SUMMIT, Fifty/Fifty (ONLY FOR WIDE MOUTH TYPES). One of the most popular hydroflask lid accessories. NOT for all brands of wide mouth water bottles. 3. PREMIUM MATERIAL - The sip lid is made of premium and durable BPA-free material that can withstand bite marks. Safe to use with hot and cold beverages. Screw the lid on tightly and it is leak-proof and spill-proof. 4. BPA-FREE & NON-TOXIC - Replacement sip lid for hydroflask wide mouth 18 oz 32 oz 40 oz, meets daily hydration on the go, allowing for easy drinking in a safer and more hygienic way. No odor will not affect your taste.