Brands like YETI have made a big splash because of their ability to keep liquids hot or cold for long periods of time. There are many brands now, particularly in the promotional products drinkware business, that have the same capabilities. What’s important now is to know what the capabilities of some of the different insulation methods are so you can be sure you are buying what you want. The guide below is the easiest way to determine that. It is very simple. The two biggest categories of insulation now are vacuum-insulated (or sealed) and copper-lined vacuum-insulated (or sealed). Copper-lined vacuum sealed is one step up in capability from vacuum-sealed. They keep drinks cold 16 and 15 hours long respectively. But the copper-lined vacuum insulated keeps liquids hot for 8 hours compared to 5 for vacuum insulated. Copper-lined subsequently do cost more. Price one of each of these two categories and decide if the heating time is worth it. I have been using the Himalayan lately and I love it. I am drinking more water because of it.
