Features: Premium silicone replacement gasket ensures leak proof performances for 40oz tumblers, featuring food grade materials that maintains liquids integrity during movement. Universally compatible design with precise dimensions fits most 40oz cups, combining flexible silicone construction with smooth surfaces hygiene for effortless cleaning and long term use. Ideal for active families, outdoor enthusiasts, and users seeking practical hydrations solution across multiple cup brands while supporting sustainable lifestyles. Perfect companion for office desks, hiking trips, or children's lunchboxes, preventing spills during commutes, workouts, and daily multitasking scenarios. Food grade silicone construction eliminates harmful chemical exposure, offering parents and health focused users peace of minds with its dishwasher safe maintenance and environmental durability. Specifications: Component: Silicone Size:Approx. water bottle lid stopper: 3.7x4.3cm/1.46x1.69inch sealing rings: outer diameter 6.8cm/2.68inch, inner diameter 5.88cm/2.31inch Color:Black/Red/Gray/Pink/Violets/Oranges/Blue Package Includes: Water Bottle Caps Stopper×4 Silicone Sealing Rings×4 note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.