What portable drinking container do you use?

Do they make any sort of nalgene bottles which are as comfortable to drink out of as a normal soda or gatorade bottle?

Also, question about the chemicals leeching from the plastic into the reused water. Why is it alright to drink the water that's been sitting in the bottle for a few months, but not the water I put in there twenty minutes earlier?

Jam it back in, in the dark.

I think the foul taste that happens to normal water bottles is due to both bacteria and food that gets on the rim. I know there are certain meals I can eat and then the bottle will taste reminiscent of that until I give it a good washing.

The only reasoning I can come up with for the argument against reusing water bottles is that there's a very small solubility of that chemical in the water and it reaches its limit almost as soon as you fill the bottle up. So each time you refill the bottle you're getting another very small dose of whatever's bad for you. But if you leave the water in there for months, no more of the chemical will leech in since it's already at its limit. Of course, this means reusing a plastic bottle yourself is no worse than just drinking pre-bottled water since you're still getting the same dosage.

I can understand not wanting to heat the bottle since heat both increases solubility of most things as well as makes it easier for chemicals to leech out of the plastic. This could be a good argument against cleaning bottles in the dishwasher since they'll probably get fairly hot. You're best off using a little dish soap and swishing it around.

Also, the small hole problem is why I like gatorade bottles. I've also come to like the vitamin water bottles since it's something like 10 ounces and fits in normal cupholders way better (but still has the wide mouth).

There's nowhere I can't reach.