The bottles are fine, if you do this only dreiviertelst full, only being transported (which does not always work out in preschoolers) fills and no fizzy drinks. When you drop the bottle nonetheless spills out liquid. The statement of Tupperware I can not share clinging simply take the bottles as an alternative to expensive bottles. Because there are bottles with the 0.75L about the 12 costs, are much better and in which you can fill with carbonated drinks even without causing leakage accidents. The bottle is but stable, you can unscrew the bottom and use it as a "cup".