Introducing the Trekk 2-in-1 Tumbler, a versatile 350ml vessel that also functions as a cooler for glass bottles. This innovative product features a built-in bottle opener on the base for added convenience. It comes with two interchangeable lids, allowing for easy conversion from a tumbler to a cooler. The cooler lid is designed with a silicone rim to securely grip the glass bottle. The tumbler is constructed with a double-walled and vacuum-insulated design. This ensures that your coffee or tea remains warm for extended periods, while also keeping glass bottles cool for hours. Experience the perfect blend of functionality and style with the Trekk 2-in-1 Tumbler.