The guesswork with a vacuum flask is always the same: is it still hot, and is it too hot to drink right now? A digital display in the lid answers both. Touch the cap and the current temperature appears, so a morning coffee, a child's hot chocolate or a flask of tea on a cold worksite can be judged before the first sip rather than after it.
Inside is double-walled 304 stainless steel with a vacuum layer between the walls, which is what keeps drinks hot through a long shift or ice-cold on a summer drive. The divided construction means no plastic taste and no lingering flavour from yesterday's coffee. The 500 ml capacity is a practical daily size — two decent mugs — and the narrow body fits standard car cup holders and bag bottle pockets.
Eight colours are available: green, purple, red, blue, white, pink, black and bright red, which makes it a straightforward gift for Father's Day, birthdays or a work Secret Santa. Hand wash the lid rather than putting the electronics through a dishwasher, and take care when opening after filling with boiling liquid, particularly around children.
