Jabos (made after 1990) are often sold as vintage.
Jabo Land has many examples listed. Focusing mostly on the ones which people named. But you can get a feel for them.
Start here:
http://anythinggoes43567.yuku.com/topic/1578/unofficial-jabos-w-names-line-reference-guide#.VL6mK9LF_h4
If they're sort of swirly but squishy and no clear idea of which is the base and which is the ribbon, then they could be Jabo.
Starting around 2008, Jabo did contract runs with special glass. Some of those had some nice ribbons, and I think those nicer ones have also made their ways into antique stores, but start with that thread to get an idea.