Imagine your hot or cold drinks and soups staying their ideal temperature for a full day's hike, or even your an entire short trip. That dream has become reality with the Thermos® Element5® Backpack Bottle. Built with tough, scientifically perfected double-wall vacuum insulation for maximum temperature retention, the Thermos Element5 Backpack Bottle keeps hot liquids hot up to 12 hours and cold liquids cold up to a full 24 hours. The durable stainless steel interior and exterior securely hold your thermos contents, and the locking ring adds an extra layer of security. 1-handed push-button operation in a sweatproof design makes your Thermos backpack bottle convenient and versatile. Fits most automotive cupholders. Manufacturer model #: TS4504BK4.