This lovely little piece of swedish art glass was produced by Orrefors and I believe it is part of the Stella pattern which was designed by Sven Palmqvist. It has thick ribs that form the piece.
An identical but slightly larger piece is shown is the Scandinavian Glass book and called a bowl. This piece is smaller and may be a very small bowl or a candle holder for a votive or tealight.
This piece measures 3" in height and 2 1/2" in diameter. It is signed on the base Orrefors, and is in excellent condition with no chips, nicks or cracks.