I always thought the reason one didn't warm formula or breast milk in the microwave is because the fat molecules get hotter faster and retain heat longer than the watery portions -- so the liquid may feel "warm" on the wrist, but include tiny drops of much hotter fat that could burn the baby's mouth. Since both formula and breast milk have fat, neither should be heated in the microwave. When my youngest went to day care at 13 months, he got water or juice in his sippee cup and skipped formula/expressed breast milk for the six hours a day he was there. Kathy Dettwyler _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.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