I've been making pens for a couple years from
www.pennstateind.com woodturners supplies. I double dip a 1/4" mandrel and use penn states gap filling epoxy to adhere the beads to the pen. I use pen blanks that all require the 7 mm tubes.
Winestoppers for glass I like the ones from Ruth Niles that someone on here recommended. I'd have to google her website. It is something like SS Niles.
http://nilesbottlestoppers.com/
Tammy ... yes finishing the whole bottle of wine at a sitting seems to be the common remark/complaint. But the stoppers look lovely in a finished bottle of wine, too!!
Penn State also carried some really nice beadable key chains for a while. The kind with the 3/32" size rod with screw on ends. Alas, they no longer stock it ... so now I'm looking at switching to either Karen Thomas "Laguna" style key chains or penn state chains on the 7 mm tube.
My best seller this year was the beadable letter openers. A beautiful, and more practical gift than the wine stopper.
One question/suggestion. Most shops are over run with jewelry and don't want to see any more ... but take some of yours in. Yours are made with your own beads and will look nothing like the "I string beads" jewelry they are already carrying. They may decide to make room for you.