The "Vacuum Flask Stem" is a lightweight stainless steel bottle that you'll want to take with you everywhere, from your daily commute to the snowy mountains. This is the "STD (Standard)" model, which doesn't come with a strap, making it easy to take in and out of your bag. It was developed as a successor to "RIVERS"' popular product, the "Flasker." By making the stainless steel as thin as possible, it achieves an ultra-lightweight body of only 200g, the same weight as a smartphone. Furthermore, thinning the stainless steel reduces the contact area between the inner and outer bottles, which decreases heat conduction, and significantly improves heat retention and cold insulation. Size: Approximately W70 x D70 x H225mm Materials: Stainless steel (body), polypropylene, silicone rubber (lid/inner stopper) Capacity: Approximately 500ml Color: Khaki