The bottles are a brilliant idea for a home refrigerator as well as on the go. My favorite so far: half an orange and half a lime or lemon into small pieces, water over it, through good cool overnight. Even with frozen fruit, such as berries:. Great result, especially since the water is cooled down immediately. You can top up water several times; the intensity of taste then decreases of course, but the drink still tastes much better than pure water.
The cover with the drinking spout keeps really nice tight, through the opening you can both drink well and pour well. The bottles are really expensive, but I think they are worth the investment.
The only complaint: the cover of the insert. Properly screw on the use he can not be, it "click" does not work either, somehow it's always terribly pfriemelig to get it right straight down to use. The thread is necessarily improved. I am not sure how long that will last before something breaks. Only reason: a star deduction.