I like the product. It's just the right size for airtravel or shorter outings, and looks great, and is very light!
Even while open, it feels very strong. (closing it makes it a pressure vessel, making it even stronger.) Significantly less flex to it than those cheap stainless ones you get for free sometimes, even though those are way heavier!
The cap is not attached in any way, so make sure to stow that carefully while drinking.
(the funnel isn't either; but that's to be expected and easier to replace)
Sadly to EU I had to pay 5 euro taxes (which is fine) and 13 euro administrative fees (which is not fine) so in total the price became over 40 euro. I most likely could've gotten it cheaper here instead...
So, EU buyers, beware of taxes! The product is great though.