As far as portable infusers go, this is by far the most superior one in my humble opinion. The sole reason for this is not the aesthetic, nor the BPA-free plastic and what have you. It is for the sole reason that the little strainer can, with the switch of a lever, be taken out of the water at will and thus you have nearly full control over the steeping time.
This is key to any tea epicurean, not so? Even the finest Yi-xing clay tumbler has nothing on this piece of plastic for this one reason. None of the portable glass presses that I’ve seen, or any other tea traveler, mug or tumbler has this option. All except this one, will leave the leaves in the water until you empty the tumbler – this is a fatal shortcoming.
All other qualities are touched on in the other review. I’ve had mine for 6 months and have had no problems with it. Water stays very warm, never spilled in my bag etc. I’ve dropped it x times to many though, far too many, and it’s not as pretty as it used to be – but it steeps as well as ever.