I've been known to use cups and saucers and candy dishes as little cache pots for displaying small plants; just sit a small plant pot down into the cup or dish for displaying. I've also planted directly into small cups and candy dishes etc. in the past. You just have to be careful with watering if there are no drainage holes. Decorative teacups make a pretty presentation! Check out these photos here of cups all planted up:
http://www.bing.com/images/sea...
http://www.bing.com/images/sea...
I've seen folks make bird feeders from old cups/saucers:
http://www.bing.com/images/sea...
http://www.bing.com/images/sea...
Some people make gardening decor with old plates etc. Check out these pretty flowers:
http://www.bing.com/images/sea...
And, don't forget to check out the Garden Art Forum for great ideas! Some of our members are quite crafty and make lovely garden decor items with recycled cups, saucers, dishes etc. Check out these threads:
The thread "Totems, Stacks and Glass in the Garden" in
Garden Art forum
The thread "Glass Plate Flowers" in
Garden Art forum