Milk is a natural liquid that usually comes from a mammal. The milk of a cow is commonly drank at breakfast. Ma Costa warmed some on a saucepan for Lyra Silvertongue the night that she ran away from Marisa Coulter. As a child, Lyra was fed milk by Diania, queen of the Fairies, who sought to keep her.
- Northern Lights
- The Subtle Knife
- The Amber Spyglass (Mentioned only)
- La Belle Sauvage
- The Secret Commonwealth