Made from fda approved food grade silicone, lightweight, portable, and commercial dishwasher safe, seff are the perfect champagne flute glasses for indoor/outdoor events and entertaining. These 180ml/6oz durable silicone champagne flutes are also safe for use from -20 to +110 degrees celsius (-4 to +230 degrees Fahrenheit), making them ideal for family friendly activities. Designed for picnics, beach days, poolside, camping, boating, concerts, festivals and more, seff are the ultimate stylish and sustainable champagne flutes for every occasion.