Forever ago, I saw these centerpieces at a corporate event.  I vowed that I would replicate it.  A few years ago, I did.  This is the easiest and least expensive tabletop decor ever.

What you need:
Glass dish--you could get fancy but mine were .97 from Wal-Mart.
Cranberries-- somewhere around $1.50 for a bag.
Water--free ☺
Floating candles/Tea lights--$1.97 for lots at Wal-Mart.