Capacity: The bigger the bottle, the larger the payload – but you won’t need a litre if the liquid’s just for you. 500ml is plenty for your favourite infusion, while 800ml is the Goldilocks option for ...

This little flask is perfect in size.' If you need something a little bigger, however, then the flask also comes in a 500ml and 1-litre size that are both currently on sale too.

There's a storm in a teacup brewing at Wimbledon: British tennis-lovers have been told not to bring Thermos flasks of tea to the All England Club. A set of picnic items, including a thermos flask ...