Skyline Chili SiLi Pint 22 oz. Silicone Straw Tumbler. Made from naturally occurring silica: a durable, non-toxic material that is flexible, durable, and can handle the heat. Safe for the microwave, dishwasher, freezer & more, and will not break, crack, chip, dent, fade or scratch. Holds both hot & cold beverages. Avoids spills with the no-slip base.