Material and cleaning Made from stainless steel and silicone, these caps are durable and rust resistant while remaining easy to clean. They provide a reliable lid solution for bottling needs and are suitable for glass bottles and syrup bottles. Airtight sealing and performance The spring mechanism delivers a tight seal to prevent leakage and keep contents secure. This helps preserve the integrity of your beverages by maintaining flavor and, where applicable, carbonation. Craft milk preservation and versatility These caps are suitable for craft milk, helping to retain the milk's flavor and bubbles. They function as airtight lids for beer bottles and as glass bottle caps, offering a versatile sealing option for various beverages. Compatibility and applications Ideal for craft milk and general bottling use, these caps serve as airtight replacement caps and milk bottle caps. They are designed for use with glass bottles, beer bottles, milk bottles, water bottles, and syrup bottles, providing a reliable seal across multiple bottle types. Use scenarios Storing homemade craft milk or dairy drinks in glass or milk bottles to preserve taste and carbonation. Sealing syrups or carbonated beverages during storage or transport to prevent leaks. Replacing lost or worn caps on glass bottles, beer bottles, or water bottles for home brewing, kitchen use, or onthego needs. Performance and reliability The combination of stainless steel and silicone materials offers a durable, long lasting cap with a secure seal. These caps provide leak prevention and dependable performance for everyday bottling tasks.