Secure replacement grommets for straw holes: These grey silicone stoppers form a tight seal around standard straw openings, helping prevent leaks and keeping drinks fresher in everyday use. Universal compatibility: Designed to work with most 20 oz and 30 oz tumblers and bottles, including common travel mugs and beverage containers that use a sealed straw opening. Pack of 10: Includes ten grey silicone replacement stoppers so you have spares for multiple tumblers, occasional loss, or rotating replacements over time. Durable silicone construction: Made from quality silicone that holds its shape and maintains sealing performance with regular use, giving reliable protection against spills. Versatile applications: Use with tumblers, wine bottles adapted for a straw opening, and other beverage containers that require a covered straw hole. Practical use examples Commute or travel: worn grommets on your 20 oz travel tumbler to stop leaks in bags and keep your drink contained on the go. Outdoor and social events: Fit a wine bottle or picnic tumbler with a stopper to reduce spill risk and protect beverages from insects or debris. Daily rotation at home or office: Keep extra stoppers on hand for multiple cups or to damaged seals quickly. What you get Ten grey silicone replacement stoppers compatible with most 20/30 oz tumblers and bottles; durable material designed to maintain seal and shape through regular use.