The tumbler is 8 inches tall and has a diameter of 2.875 inches. This tumbler holds 600ml of liquid. It has a double wall vacuum insulation design and is made with 18/8 food grade 304 stainless steel. This skinny tumbler helps maintain your drinks at the right temperature for hours (keep your drinks hot for 6 hours and cold for 12 hours). It has a slide-open BPA-Free lid top with a rubber rim. It is leakproof,but I would advise to keep upright at all times. It has a non-slip rubber base.