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.

BPA-free lid is designed with a hole to facilitate the use of straws, and the hole of the lip can also be covered to prevent liquid from spilling and not splashing on clothing.

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.

Whether you're celebrating an anniversary, going on holiday, or simply enjoying a weekend getaway, this tumbler is a must-have. Its high-quality construction and unique design make it a great gift for friends, family, or even yourself.