The color of your breast milk might vary, depending on your diet. Thaw milk overnight in the refrigerator, or hold the bottle under warm running water to quickly thaw. Follow us email facebook twitter pinterest instagram Google Plus youTube rss. If your LO will take a cold bottle, you could do a cooler bag on the table to keep it safe. Adding breast milk to yesterdays milk would make me nervous. References Your guide to breastfeeding.