SIZE: The reusable tumbler is 3.62 inches in diameter and 8.66 inches tall, with a capacity of 24 ounces.MATERIAL: The durable tumbler is made from 18/8 stainless steel with a silicone wrap. All materials are food safe and completely BPA free.VACUUM INSULATION: The insulated tumbler retains temperature for longer: hot drinks stay hot up to 4 hours and cold drinks stay cold up to 18 hours. The vacuum insulation also prevents condensation from forming on the outside.TRAVEL DESIGN: The drinking tumbler fits in most car cup holders and has a silicone wrap that helps with grip. The easy-open, leak-proof Click-It lid is perfect for preventing splashes during travel.LIFESTYLE: Zak Designs makes hydration fun! Enjoy hot or cold drinks at the perfect temperature with this insulated tumbler. The drinkware is fully reusable and a fun addition to the daily routine.