Refill your cup less without sacrificing hydration with the Owala Travel 40 oz Stainless Steel Tumbler. This versatile tumbler features a 2-in-1 lid and removable straw, allowing you to sip or swig, and it is double insulated to help keep your drinks at your preferred temperature. Owala Travel 40 oz Stainless Steel Tumbler Dune Drifter - Thermos/Cups &koozies at Academy Sports.