No need to buy a new bottle when you can replace the gasket. The Impresa gasket for Thermoflask lid replacement fits 40 oz water bottles with straw lid and chug lid with spout top. Eliminate the hassle of ill-fitting generic gaskets. These are specially designed to match your preferred lid for water bottle use. A tight seal to prevent leaks — whether you're exercising, commuting, or traveling, no one wants a leaky water flask. Maintain a tight seal with the gaskets for Thermoflask double wall water bottle lid replacement. A tight seal helps maintain insulation to keep drinks cold or hot. Protect belongings from water damage and replace worn-out gaskets in your water bottle cap. Extend the lifespan of your water bottle — keep your 40 oz insulated water bottle in top condition with this essential component. Improve hygiene by replacing old gaskets that may harbor dirt and debris. Protect the functionality of your chug lid with spout or straw lid water bottle with the Impresa gasket for Thermoflask lids. These food-safe silicone gaskets for Thermoflask water bottles come in a pack of 9 — 3 each for 3 different lid types. Easy to use — the spout gasket features tabs for easy replacement, making accessory upkeep quick and simple. Remove the existing gasket by gently pulling it out. Insert the gasket with tab side up for lids and flat side down for spouts. Made of food-grade silicone, BPA-free, and dishwasher safe. Replace every 4 to 6 months depending on frequency of use. Compatible with 24, 32, 40, and 64 oz bottles. Material: Silicone Color: Transparent Package Contents: 9 x Water Bottle Gaskets (3 styles, 3 of each style)