especially functional and high quality. The bottle holds what it promises: it is comfortable to hold, the closure is sealed, the items easy cleaning felt apart or together to build. The (self) weight is slightly higher than other bottles, for the insulation works quite well by the double wall. The only - for me - minus point is the 'nipple'. I do not like so much to have to bite it in order to drink can. All in all a good product whose purchase is not regretted.
