Double Wall Stainless Steel Vacuum Bottle | Large Mouth Hot & Cold Water Flask with Carry Handle | Sports Travel Water Bottle for School, Gym, Office & Outdoor Use

The double wall vacuum insulation helps maintain drink temperature better than normal plastic bottles. The label mentions cold up to 24 hours and hot up to 8 hours, but don’t ove sell it blindly unless you test your actual stock. Real performance can depend on drink temperature, outside weather, and how often the bottle is opened.