not unless it is graduated
people that maybe had someone in there family poisoned by there drink so you would use a flask for your own sakeor just personal hygene
science is science and therefore must be relevant to the entirety of its self
There are a lot of science types but these are just the main types: Biology, Chemistry, Physics, Philosophy, etc. If this didn't help, my other answer is: Look up on google, youtube, etc. websites...
you use it to measure things and also to hold liquids