Robust Structure: Made of high quality 100% food-grade silicone and stainless steel,non-toxic.Preserve Freshness: The cone-shaped stopper is primarily used for wine bottles, but works equally well for oil, beer and other bottles. 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.Convenient Usage: Suitable for all size wine bottles and gives them an airtight seal ensuring freshness for later.Convenient Storage: Easy to insert and remove just with a single slight pull. Durable silicone and stainless steel don't rust, crack or fade.Guarantee: FDA Approved Food Grade Silicone. Microwave, oven, freezer, and dishwasher safe. Good for temperatures from -40 to 446 degrees Fahrenheit.SAFE AND PREMIUM QUALITY: These wine stoppers are made of food-grade silicone and stainless steel,toxic free.WINE FLAVOR PRESERVER - These wine stopper will help to create an airtight condition that preserves wine once the bottle has been opened, keep the wine fresh and tasty for a few days.