1.Robust Structure:These silicone wine bottle stoppers are made of high quality durable silicone and stainless steel core won't ruts, nor fade,non-toxic. 2.Preserve Freshness: It keeps the beverage or liquid in the bottles fresh longer than traditional corks by preventing unwanted odors and air bubbles from seeping in and spoiling what's inside. 3.Convenient Usage: The silicone cone-shaped stopper is reusable, ad suitable for all size wine bottles, and also for oil bottles, beer bottles, soy bottles, vinegar bottle and other bottles. 4.Convenient Storage: Easy to insert and remove just with a single slight pull. The silicone reusable stoppers are soft and highly resilient and non-stick. 5.Fit: Good for microwave, oven, freezer, and dishwasher safe.