Rishi Sunak coffee mug: This is where to buy chancellor's £180 smart travel cup

The pre-budget photo shows him with the expensive gadget that tracks your caffeine intake and maintains your preferred drinking temperature

The gadget was reportedly a gift from his wife (PA)

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Ember travel mug 2, 355ml: From £159.99

This is the fanciest reusable coffee cup we’ve ever clapped eyes on – and so it should be for the price. Not only does this cup maintain your preferred temperature (with both suggested and customisable presets), but it also shows when the contents have reached that temperature, so you don’t burn yourself.

The nifty app does just about anything you could ask for, with brewing timers for tea, suggested presets for latte, green tea, cappuccinos and so on. There’s also an interesting recipe section, with ideas for a cinnamon matcha latte, a beet latte and more. It’s sparsely populated at the time of writing, but we’d be interested in seeing how it develops.

The other interesting aspect of the app is that it tracks your caffeine intake. You can then upload the information to Apple Health, along with your heart rate and sleep data. This is a nice touch, but of course you need an Apple Watch in order to be able to use it effectively.

The cup itself has an appealingly sleek design, although it’s a little on the large side for just throwing in your bag. The mouthpiece (a circle in the lid that you press down to open) feels quite cool at first but could get a bit dribbly as residual liquid sits on top. That said, it’s definitely leak-proof – and keeps your tea or coffee warm.

As for the battery, you can use it at least twice, keeping the liquid warm for the entire day, before recharging. And when it’s not in use, you can park the mug on its own little charging stand. One for health and tech junkies.

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Read the full review of the best reusable coffee cups

Review by Lydia Winter