This hydrator is designed to hold 35 ounces of cold beverages and is well-insulated, with an elevated handle and cup holder compatibility. It is made of 18/8 stainless steel to resist dents, drops, and has double-wall vacuum insulation to keep drinks cold. The design prevents condensation, keeping hands dry. It is dishwasher safe for convenience. The straw lids are durable, with a secure straw holder and are shatter-resistant, dishwasher-safe, and BPA free. However, it should not be used with hot beverages.