Cirkul black & white checkered 30oz tumbler with straw #checkered #hydration Cirkul 30oz Travel StrawSip Double-Wall Insulated Stainless Steel Tumbler with Handle. The Cirkul 30oz Travel StrawSip Tumbler is a stylish and functional stainless steel tumbler with a sleek black color and a checkered pattern on the handle. This tumbler set includes 2 items, each with a capacity of 30 oz and an insulated design to keep your drinks at the perfect temperature. The convenient drink-through lid and comfortable handle make it easy to enjoy your favorite beverages on the go. Perfect for both hot and cold drinks, this tumbler is a practical choice for everyday use.