most of those were made by L.E. Smith Glass co. in the late 1950ties-1960's. Viking Glass produced quite a few also but thicker. Made to hold one rose or bunch of flowers etc. I have sold them mostly to young people who get a kick out of using them to serve wine. The tallest I have had was 30in. They are popular and I sell quite a few. It's something the younger people like. They come in beautiful color's. and are called swung vases. L. E. Smith has been in business for over 100 years and I think still in business. I sell mine for $18.to $37.00 depending on height and color. Have a good day!