The Eco-friendly Travel Vacuum Flask is made of stainless steel and food grade plastic along with comfortable rubber. The 510ml high quality thermos maintains the temperature of your beverage for roughly 7-10 hours which keeps the taste and temperature perfect when ready to consume. A leak proof coffee thermos that can be taken anywhere and comes in 5 plain colours to match your style. The simplicity of the thermos travel mug is right for any setting; traveling, running, at the office, at school, dancing, yoga class etc. The portable coffee flask has a rubber lid that makes it easy to drink from without any accidents. A must have mug for anyone that is always on the go.