Vintage Indiana University Paper Mache or Plaster? Halloween Bucket 90's decor

Vintage Halloween trick or treat candy bucket - material is some type of hard paper mache / plaster, not sure which. Has original tag attached. Bucket is in gently used condition, has a few scuff marks throughout, some light paint loss, some settled dust in the nooks and crevices. Measures approx 7 inches tall not including the handle. Very unique and hard to find piece.