Set of 10 foodgrade silicone grommets designed to seal straw holes on 20 oz and 30 oz tumblers and to act as stoppers for standard wine bottles. Key benefits Prevent spills and leaks: creates an airtight seal to keep drinks from splashing or leaking during travel or daily use. Preserve freshness and hygiene: blocks contaminants, insects and air to keep beverages tasting as intended. Ready backup supply: pack of 10 ensures replacements, spares for multiple tumblers, or sharing across household members. Why you need this Stops accidental spills when you're commuting, exercising, or moving between rooms. Keeps wine or open bottle beverages protected between pours without transferring to another container. Replaces lost or damaged inserts for 20 oz and 30 oz tumblers without buying lids. What makes it stand out Universal fit: sized for 20 oz and 30 oz tumblers and compatible with standard wine bottle openings for multipurpose use. Durable, foodgrade silicone: holds its shape through repeated use while providing a reliable seal. Dual function: works as both a straw hole stopper for tumblers and as a bottle stopper, reducing the need for multiple specialty products. Simple to use For tumblers: insert the grommet into the straw hole and press until snug; removes easily when you need to use the straw. For bottles: push into the bottle opening to form a tight seal and pull out when ready to pour. Practical use scenarios Daily commute: prevent coffee or smoothie spills in your bag or car by sealing the straw opening when not drinking. Outdoor gatherings: use as a wine bottle stopper at picnics or barbecues to keep beverages fresh and insects out. Family use: keep children's tumblers spillresistant at home or on outings. Specifications Quantity: 10 grommets per set Compatibility: 20 oz and 30 oz tumblers; standard wine bottle openings Material: foodgrade silicone Function: straw hole stopper and wine bottle stopper Reliable, reusable, and simple—keeps drinks contained and protected without changing how you use your favorite tumblers or bottles.