Secure closure and leakproof performance A secure, leakproof closure keeps beverages fresh and prevents spills. Compatible with beer bottle airtight lids and glass bottles with airtight lids. Attractive design Practical yet visually appealing, these caps enhance the look of glass bottles and can function as bottle stoppers or glass bottle caps. Leak prevention Prevents leaks to keep beverages fresh and secure without mess. Compatible with small glass bottles with lids and oil bottles with airtight lids. Easy access Clip swing design provides easy access to beverages; simple to open and close the bottles, with swing lids for effortless use. Key specifications and compatibility Function: airtight seal for glass bottles, leak prevention, easyaccess closure. Compatibility: designed for glass bottles; works with beer bottle airtight lids, small glass bottles with lids, and oil bottles with airtight lids. Size: designed for standard glass bottles (no specific measurements provided). Material: not specified by the manufacturer. Performance: reliable sealing, durable swing mechanism, spill operation. Use scenarios Home brewing and beverage storage: seal beer bottles or other glass bottles with airtight lids to preserve carbonation and prevent leaks during storage. Kitchen and pantry organization: store oils, vinegars, or flavorful beverages in small glass bottles equipped with airtight lids, keeping contents fresh and mess. Onthego gatherings: ideal for picnics, parties, or small events where quick access to beverages is desirable and spill risk is minimized.