Nice packaging, material feels great. Looks way better than KeepCup. The lid has a locking mechanism with the rubber to seal leaking and to lock the lid in place. I've tested it with water filled fully and shake it really hard... result is you do need to turn the lid clockwise all the way down to be 100% leak-proof, but when you do it is leak-proof. Great product.
Good sturdy cup. easy enough to clean and size is roughly a large in most Sydney coffee shops. Mouth piece feels like standard non reuse able cup so a very familiar feeling when I'm drinking from it. A little disappointed it doesn't keep my coffee as long as I expected (hence 4stars) being double walled and considering it's hot as right now, can't imagine its going to be too good in winter. In saying that my hands are kept cool when holding the cup so it is doing its thing, big plus for me. Maybe my expectectations are a little high. Mrs commented that the cup is a little large and a bit harder to hold in her hand. Though she is quite fussy about these things and her hands are same size as mine and I don't notice.
Good coffee cup, it actually seals very well with the lid closed. Super easy to clean just a rinse and leave it to dry. Decent size too and fits under a commercial la marzocco coffee machine as well as the home single group machine.
Light, well made, does not leak at all. Better than other plastic reusable cups I've had. Not quite as good as a glass cup in terms of smell, but the fact that it doesn't leak at all gives it a huge advantage.