Oh cool....I never would have thought to use a crock pot. Good idea! 
I use the bags though as liners in the Playtex bottles so unless the parent brings the bottler liner inserts, I have to use the bag. So far, though I have been fairly lucky and not had any if the bags leak or break open.

I use the bags though as liners in the Playtex bottles so unless the parent brings the bottler liner inserts, I have to use the bag. So far, though I have been fairly lucky and not had any if the bags leak or break open.
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