The travel tumbler has a completely closed clear lid and the silicone gasket on the lid ensures that the tumbler is 100% leak-proof and dust-proof.

The ergonomic design allows one hand to use double-layer insulated water cups. The proper diameter allows it to be carried in a variety of ways, such as a standard bicycle bottle holder/cage, an adult backpack with external pockets, or a car cup holder.

These stainless steel tumblers feature a double-walled vacuum stainless steel body that ensures it is excellent at temperature protection. The tumblers keep your water hot or cold for hours at room temperature.

This 20 oz tumbler is designed for everyday use at home, in the office, and at outdoor parties and events, such as sports, traveling, camping, and driving. Perfect for office workers, drivers, students, teachers, BBQ experts, party favors, sailors, etc.