24 hours cold, 12 hours hot Never need to take a plastic bottle with you again - use this high quality, super-insulated marine-grade (316L) black powder coated stainless steel water bottle (which will not corrode) to keep hydrated during any adventure. The ideal drinks flask for keeping your drink hot during those colder months or cold drinks cold when the temperature climbs.  What's in the (recycled cardboard) box: 750ml insulated stainless steel water bottle, a canteen cap, and a sports straw drinking cap.