BPA-free do not contain the chemical compound bisphenol
304 stainless steel 18/8 food-grade is safe at any temperature and won’t leach chemicals into your water if it’s scratched or ages.
A vacuum-insulated water bottle this means it has two walls with a vacuum layer in between. This vacuum acts as a barrier to minimize heat transfer, keeping hot beverages hot and cold beverages chilled for extended periods of time
