Water bottles are becoming so thin and floppy, they are almost unusable, except maybe as a condom later on...but that would be taking recycling a little too far...
Would you like a sip of water now?

Bottles as condoms ...ummm...
I don't think it will fit...lol.. at least not through the opening...lmao.. maybe if you cut the neck off...I kill me..lol

You should buy the wide mouth bottles, then.

..umm.. way ahead of you!! still doesn't fit .lol..

Not That one would try..wink..
I have heard stories of people using Saran Wrap and sandwich bags..
.. I guess desperate times call for desperate measures..lol

You know, your standard condom can hold over a liter of water how ever with all the spermicides and lubricants they put on them now a days I don't thing I'd be eager to drink from one. As for the other way round, I'd have no problem putting one on unlike the good Dr., it might even be a little loose. It would be all bonuses from there, increased length, increased girth, increased stamina, hell for once in my life I could roll like a porn star.