These are square borosilicate glass drinking mugs with lids and straws. Made from extra durable, heat-resistant borosilicate glass. Suitable for both hot and cold beverages, Features a handle, a secure lid, and a glass straw, making them suitable for drinking on the go. The non-porous glass material is hygienic and easy to clean. Typically sold in sets and can be used for various drinks like coffee, tea, juice, or smoothies