Resa Flip 35oz | Cascade

This tumbler holds thirty-five ounces, keeps cold drinks cold for more than twenty-four hours, and has a flip lid with a silicone straw that seals completely when you lock it. The straw itself is silicone for a soft feel, with a stainless steel option included so you can skip plastic altogether. A handle runs along one side, so you can carry it without gripping the body, and the base fits standard cup holders.

The lid mechanism slides to lock and unlock. When locked, it will not leak with cold or iced carbonated drinks—though carbonated beverages need roughly half ice to liquid to avoid pressure issues. The lid is not designed to be locked with hot liquids; using a straw with hot beverages carries a burn risk.

A removable sleeve wraps the outside to protect against dents and scratches if you knock it over or drop it. You can swap the sleeve for a different color or pattern, or go without it entirely if you prefer the bare steel.

The silicone straw makes each sip quieter and gentler on your teeth than hard plastic. The stainless steel straw is there for anyone who wants to avoid disposable materials. Both fit the same lid, so you can choose based on the day or the drink.

The handle is molded into the design rather than clipped on, so it stays secure whether the tumbler is full or empty. The flip lid opens with one hand, and the lock slides into place with a push. Because the base tapers to fit a cup holder, it works in a car, on a bike, or in a backpack side pocket without tipping.

Cold retention is rated for over a day, so ice added in the morning will still be there the next morning. The double-walled vacuum insulation prevents condensation from forming on the outside, so no rings on your desk or wet spots in your bag. The wide mouth makes it easy to add ice cubes or clean by hand.