Originally Posted by cordelli

Companies like http://www.alltravelsizes.com/ sell things like detergent and bleach in single use packets, as does pretty much any self service laundry, not sure which is less expensive. ....
I personally love aluminum bottles for stuff, it can usually take a beating.
http://www.ebottles.com/showbottles.asp?familyid=1418 for example has them, as do most travel stores.