be an inventor
I like the Starbucks ones, but I'm not sure they fit requirement #3 and the big ones are a little too tall for some smaller microwaves if reheating coffee or tea.
I had a Redskins mug a couple years ago that i think met all your criteria. the top was pressure-sealed - you had to press down on a lip to move the pieces apart enough to get liquid out, and they snapped apart to wash. i have NO idea where it came from, tho. I'll have to see if i can find it this weekend.
This one totally fits the bill EXCEPT that the top parts don't come *completely* apart. Honestly, I think you can either have a lid that comes apart completely or a liquid-tight seal - not both. But other than that, I love this one. I left it at home accidentally one time (coffee poured roughly 7:45am) and when my roommate brought it to me at school my bevvie was still steaming hot (at approximately 12:30pm). And, I've thrown it in my backpack, dropped it, etc. It's great (even if it is "Lance Armstrong").