Bottles, infusers and leakproof caps

A bottle is judged on its cap. Volume, colour and material come after: the cap decides whether it goes in the bag every morning or into the cupboard after three weeks. A cap that leaks in a bag once never travels again.

Third point: tea left in its bottle keeps brewing and turns bitter within an hour. A removable basket settles that in one movement, and it is the difference between a tea bottle and a bottle you put tea in.