Ladies and gentlemen, I present to you:
The Camelbak. I bought one primarily for use in my martial arts classes, so I wouldn't have to buy bottled water. But then I found that I was drinking from it constantly every day, filling and refilling occasionally, consuming 4-5L which is about twice the recommended amount.
And I did this because, unconsciously, I thought of it as a sippy cup.
It holds 0.75L of water, three times the capacity of a typical baby bottle, and some are constructed from stainless steel, and keeps liquids cooler longer. The straw can be locked and unlocked, so that even if you threw it around nothing would spill. You can do both with only your thumb, with a little practice. And, of course, the only way to drink from it is sucking through the straw.
But by far the best feature of the Camelbak, Nalgene, and other sports bottles is that nobody will ever give you a funny look for carrying one around. I don't think this is an entirely revolutionary concept, but it is most certainly a useful idea for the AB who has an oral fixation and is embarrassed easily in public, with the added bonus of making drinking water easier and tastier and healthier.