My LO, 15 months, throws his sippy cup constantly. Breakfast, lunch, snack, dinner. He does it after only a few sips, so I know he's still thirsty - but I'm not sure how to handle it, beyond picking it up again time after time, which is getting old. "No" isn't very effective, with or without redirection - he smiles and goes about his merry, cup-chucking way. This has been going on for months! I usually give him diluted fruit juice, and I'm tired of the kitchen floor getting so sticky Any ideas?