I like Sobe LifeWater, the kind that's sweetened with Stevia and has no sugar or artificial sweeteners, but it's expensive. I bought 10 on sale for $1 each and got a $5 Target gift card, making them affordable for once!
I woke up one morning and my daughter and her girlfriend had drank 6 of them overnight. 6!!!!!!!!!!!!!!!!
I waa not happy; these are my "special" drinks and they are welcome to 1 per day, as I am, but 6 (3 each, effectively) overnight? Ridiculous. AND after I had just made 2 pitchers of fancy organic iced tea that they love, and told them it was for them.
Oh well. Life goes on!
Other than that type of thing, I don't care if they eat a lot of the food in the house, as I like to see my daughter and her friends eating well and I know they do when they're here.