Made from fda approved food grade silicone, lightweight, portable, and commercial dishwasher safe, stemm are the perfect stemmed glasses for indoor/outdoor events and entertaining. These durable silicone wine glasses are also freezer, oven, and microwave safe, making them them ideal for family friendly activities. Designed for picnics, beach days, poolside, camping, boating, concerts, festivals and more, stemm are the ultimate stylish and sustainable outdoor wine glasses for every occasion.