Reproduction WW2 German Butter Dish or "Fettdose". Originals
were made of Bakelite and came in various colors. These
repros are made of plastic that simulates the original Bakelite material. The plastic is a bit stronger
than the original Bakelite construction and much safer to
use for food. The threads are spaced like the originals and
it takes about 1/4 turn to close or open them.