I haven't fully tested this product so I can't say if this thing can keep hot or cold liquids at the same temperature for long hours of time. But I do know according to their paperwork there are many of things that you can't store in this container, and there are many of activities that you can't involve this container in. Such as you can't store carbonated drinks, fruit juice, milk, and any fermented beverages; use only water, or neutral detergent to clean the bottle; do not use chlorine bleachSee full review