Can the difference be tasted in watered down liquor?!
I'm not talking filling the bottle halfway with water, I mean putting like an inch and a half of water into 6 inches if clear tequila. The owner is a teenage girl who likes to party, not a liquor connoisseur. Will she know the difference if I water down her liquor?
Answers:
Absolutely, especially tequila. If she was going to be mixing the liquor into something, it may go unnoticed by a teenage girl.
Unless she marks the bottle, she won't notice an inch or two missing anyways.
Yes it will be noticeable in the taste.
Yes, it will be noticeable.