We went with undies from the get go. DS usually goes to bed around 8 in the summer and we stop liquids at 5. This doesn't mean he doesn't get anything to drink. He just doesn't have his sippy cup out and readily available to him. If he asks for a drink I will get him a drink in a dixie cup. The same goes with dinner. I usually allow him to practice with a big boy cup and limit his intake. We aren't playing outside in the evenings anymore because it is to hot outside so I don't need to worry about water consumption.
Re: Liquids