Last year I bought these whimsical spheres of clear handblown glass and used them for tea lights and flowers in the Succah. I hung them them with clear fishing wire so it gave the illusion of floating lights. At $3.95 each, they are an inexpensive way to decorate the Succah. Buy a few extra though, I did break a few while hanging them.
Available at CB2.com  for $3.95 each