Unlike double-walled mugs, the Delta Insulmug from Sea to Summit also protects the liquid inside the mug from cooling or heating, not just your hands from the heat of the contents. The innovative base with a Protex hexagonal design optimally distributes heat across the bottom of the mug, so you won't burn yourself when holding it. Additionally, the lid enhances insulation as it seals perfectly. It’s convenient that you can drink directly from the Delta Insulmug through an opening in the lid, and thanks to the concave shape of the lid, no residual liquid remains on it. The shape of the mug is ergonomically designed, with rounded corners and a thumb grip, ensuring that the Delta Insulmug fits perfectly in your hand. And when it’s not in use, it can be easily hung up using an integrated loop.