https://www.burton.co.uk/product/mountain-warehouse-double-walled-flask-rubber-leak-proof-lid-insulated-thermos_p-7c0af538-99ca-4771-bfd4-2067ebc86941£colour=Teal&size=One%20Size

The Double Walled Rubber Finish Flask is ideal for winter days out and everyday use. Holds up to 350ml and is insulated to help maintain the temperature of your liquids, while the double wall prevents the outside of the flask getting too hot. Capacity - this flask has a capacity of 350ml Double Walled - insulated to maintain liquid temperature without transferring heat to the outer wall. Leakproof Lid - watertight seal lid with push button release for easy pouring (Ref: 025656) | Mountain Warehouse Double Walled Flask Rubber Leak Proof Lid Insulated Thermos in Teal - Manufacturers part number: Mountain Warehouse_5057634066846