Milk glass doesn’t just refer to the glass you use to drink your milk. The term is used by collectors referring to a special white opaque type of glass. To Victorian's it became an inexpensive alternative to porcelain tableware. Milk glass has been in production for centuries but before 1900, milk glass was called opal glass by the glass manufacturing companies. It wasn’t until after the 1900’s that the general public started using the term milk glass.
The old trade catalogues from that time show a huge variety of objects often called novelty pieces. These included, dresser sets, pin trays, salt and pepper shakers, souvenir pieces, nesting chickens, hand painted Easter eggs and just about every kind of whimsy imaginable. (all the linked items are for sale at Reuzeit Emporium)