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