Design Letters Personal Thermos Thermos that fits perfectly with the Design Letters lunch box in A-Z. It is a modern thermos that you can take with you on the go, and the clean Nordic design with the black letters make it something everyone can use. The thermos keeps liquids warm up to 12 hours and cold up to 24 hours. It is sold in all letters from A-Z.Useful information about Design Letters Personal Thermos Size: 19,5 x 7,5 cmMaterial: SteelBPA/BPS/EA freeVolume: 500 ml A-ZDesigned by Tobias Jacobsen.