Written by Kate Tietje, Contributing Writer In my house, the beverage option is usually simple: water.  It's always there, it's very cheap, and my kids know to ask for it (and not ask for other stuff). Of course, this gets boring sometimes.  Who wants to always drink water?!  I know I don't.  However, buying drinks is expensive.  I know that when we are at Grandma's house, my kids could go through a $4 bottle of juice in about a day (granted it's a special treat there and [...]