ZOJIRUSHI SM-TA60BA Stainless Stainless Steel Vacuum Insulated Mug, Black by Amazon.co.uk

• Stainless steel vacuum insulation keeps beverages hot or cold for hours. Heat retention: 190°f @ 1 hr./ 163°f @ 6 hrs, cold retention: 46°f @ 6 hrs

• Stopper disassembles for thorough cleaning

• 2-Step lid release process prevents excess condensation on the stopper from being flung off while the lid opens

• Easy-to-clean double layer nonstick Coated interior enhances durability, and provides greater protection of the stainless steel against salt-containing beverages like sports drinks

• Safety lock to prevent the lid from opening accidentally