A double-wall stainless steel bottle is one of the most common replacements for bottled drinks. The vacuum between the two walls slows heat transfer, so cold drinks stay cold and hot drinks stay hot for longer than in a single-wall bottle. How long depends on the model and conditions, so check the maker’s stated figures.
When comparing options, look at what the lid, straw and seal are made of, whether the mouth is wide enough to clean easily, and whether replacement lids are sold. For more detail, read how to choose a reusable water bottle.
