I dusted off my toothpick holder book and searched for something like yours. There is a drawing on page 59 of Bredehoft & Sanford's Glass Toothpick Holders that looks like your glass a good bit. The pattern in the book was made by Doyle & Co. of Pittsburgh in the mid-to-late 1880s. The pattern is Hobnail with Thumbprint Base (OMN No. 150). The book shows a sugar, cream, and spoon. It is a toy set, though dimensions are not given. I'm not sure whether your piece might be the sugar without lid or the spoon, or something else entirely. The pattern was made in clear, amber, and blue. So maybe it is what your glass is.