I love this wedding idea - using apothecary jars or any kind of glass jar for either candy buffets, cookie buffets, popcorn bars or anything else you can think of. With the items being displayed in glass, you can make any table arrangement look stunning. And you can turn the 'buffet' of candy, cookies or popcorn into a self-serve favor station. You can provide your guests with favor boxes or bags and decorative scoops so your guests can put together their own sweet treat to take home and enjoy. You can pre-attach a label to the favor boxes (maybe with your names, wedding date and 'Enjoy!' on it) and with the favor bags, you could decorate them using rubber-stamps. Adding ribbons around the glass jars and with labels identifying the candy, cookies and/or flavor of popcorn makes the display even more special.
Probably, the hardest decision to make will be what colors and candy to use. All white? An array of colors? Only the wedding colors?
Glass jars also make wonderful additions to tables filled with fruit (limes, lemons, apples, etc), sea shells - the possibilities are endless.
Top Right: courtesy of dnn_rchmnd's flickr photo gallery
Left: courtesy of presentpast's flickr photo gallery
Middle Right: courtesy of Brides.com
Bottom Left: Michaels Arts and Crafts
Bottom Right: Jo Gartin of Love Luck and Angels