I think that the plastic bags do get contaminated more becoz they are not rigid and therefore it is hard to pour the milk in there and fingers inevitably touch the insides of the top of the bag; same when pouring out of these bags or turning over, twisting, tying the bag. Also I agree that tears, cracks etc can more easily occur and maybe even microscopic ones that we cannot see with the naked eye. Laurie Wheeler, RN, MN, IBCLC Violet Louisiana, s.e. USA ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html