There's nothing more frustrating (or painful) than stubborn milk that just won't release. Instant heat breast warmers are convenient, hands-free, reusable click-to-heat packs that warm your sore Boobs to help speed up milk flow and loosen blockages + clogged ducts. Instant relief for breastfeeding pain - no microwave needed. Use before or after nursing and while pumping to milk it for all it's worth.