Pillar candles can be used in a variety of ways, but this is a fun way to give pillar candles a fresh new look.  Turn square vases upside down and carefully fill with fruit or other decorative items.  This one has a contrasting citrus theme with lemons and limes, but this would also look great with bright red or green apples, oranges, pine cones, or even Christmas ornaments.  This could really be customized to suit any season, holiday, or decor theme.  Place pillar candles of varying heights on top of the square vases.  Then, light the candles and enjoy!