These heat shrink capsules are made of PVC material, which is flexible and durable, and has good heat conductivity that conforms to the shape of the bottle neck to keep fresh. Provide a tight and secure seal to preserve the freshness and quality of wine, meanwhile preventing dust, and can also be used as a decoration for wine bottles, the classic design makes the bottle look more elegant and suitable for giving as a gift after brewing. Easy to use, the heat shrink capsules are placed over the bottle neck and heated with a hair dryer or steam to shrink and conform tightly to the shape of the bottle, creating a sealed finish, boiling hot water can also shrink well. The heat shrink caps are suitable for a variety of wine bottles: ice wine bottles, red wine bottles, beer bottles, and fruit wine bottles. Also can be used for olive oil bottle, condiment bottle and more. Good for bars, parties, picnic, wine cellars, home, kitchens, etc. Material: PVC Total Size: PVC Heat Shrink Capsules