GEFU | Thermal 400ml Mug NEVIO Silver | 12727The Gefu Nevio Thermal Mug 400ml is cool, tough stainless steel buddy for drinks "to go" at school, work and on the road. Available in Black and Silver colourways. Its double walled insulation keeps tea or coffee hot for up to 4 hours and water or juice refreshingly cold for up to 8 hours. With a practical push button closure and 100% leak proof. Re usable for added value. The longer you can use a product, the better it is for the environment. GEFU