Tall clear vase filled with water and pretty flowers and floating candle. Super easy inexpensive wedding reception centerpieces or change it up for your home for a holiday party.a red candle and holly branches for Christmas.
I have also seen similar centerpieces that use epsom salts instead of sugar. You could also sprinkle a mix of pearls/gems. Sand (or sugar), faux pearls, a 3 candle. An easy DIY wedding centerpiece idea.