Our most popular... With a convenient capacity of approximately 600 ml/20 oz, this insulated tumbler is ideal for holding a variety of beverages, whether hot or cold. Tumblers are made of quality 304 stainless steel material, with a reliable double-wall design to insulate the interior beverage to an ideal temperature, and the lids are made of quality ABS material, equipped with a detachable rubber ring to achieve a better sealing effect. There is a hole on the lids for inserting straws (not included), and the push lid design prevents drinks from spilling. Lots of colors!