Well done Carolyn, I think you get the cookies.

Jenny Thompson's book does give the RD as a vase in the listings, but in the text on page 12 she also says that the registration was for the the top alone (i.e. that leaf frill pattern), and that this was also found as a nightlight holder in both plain and coloured glass.
I think what you have, TC, is the nightlight holder version of the design - as Carolyn says, a candle holder.
