Made of premium quality silicone material that is durable and will last a lifetime. Hand-wash or throw them in the dishwasher as many times as you need.These wine stoppers are designed to keep your wine fresh for weeks. The cap provides an airtight seal that is leak proof on your wine bottles. You can throw away that cork!These caps are great for shielding your beer bottle when you are outside on your patio. Will fit standard sized wine bottles & beer bottles. Perfect wine stopper, beer cover, or wine gifts