Contigo Biscay Bay West Loop Autoseal Travel, Thermal, Vacuum Flask, Leakproof Mug with BPA-free Easy-Clean Lid - £15 @ Amazon

100 % SEALED AND LEAK PROOF: Auto seal technology automatically seals between sips to prevent leaks and spills; lid-lock prevents the Auto seal button from accidently being pushed while on-the-go
ICE COLD OR PIPING HOT: Thermalock double-wall vacuum insulation keeps temperatures locked in for hours; drinks stay hot up to 5 hours or cold up to 12 hours, on the go, in the office or outdoors
DURABLE: High-quality travel mug, BPA-free plastic lid and vacuum insulated stainless steel body; the sweat proof design makes sure your liquids stay in the thermal mug, not on the outside
EASY TO CLEAN: Dishwasher-safe lid hinges open completely for easy cleaning (one piece, no separate parts to take apart or misplace); hand wash vacuum flask body
IDEAL FIT: The sustainable and environmentally friendly stainless steel thermal mug fits into all common car cupholders; size 8 x 9 x 20.5 cm; Capacity 470 ml; Weight 340 g