See Collection Information Form for more information. Part of a larger collection. See also Acc.# 1.89.21; 38.84.1-6,9-12,14,15; 18.84.55,57,73-86. Waldorf City Business - Plum Valley Creamery Association. Freedom Township. Dairy. The flat paper hat was first worn by creamery employees at work. After they switched to hard hats, the paper hats were given to children who visited the creamery.