That is what makes it so perfect. One of my "rules" a gallon of milk if never allowed to be put on the table. If you want a glass of milk, you have to get up, walk over to the fridge and get it yourself. Something I always personally did but something I had to re -enforce when my 6'9" kid polished off a gallon of milk one night that the dinner table. A pretty amazing feat if I hadn't had to pay for the milk.
But with the water, iced like they all like it, and sitting right there on the table ... It is just too tempting for their lazy natures. Lol. Even the kids that don't like water.