For one of your table options grouping floating candle vases together is a pretty option for a non-floral centerpieces. To add the "wow", tint the water in some of the vases a dark purple and some a light purple and float gold candles.
wine glass used as candle holder. put a flower or decoration under. : wedding black blue brown candle decoration diy flowers gold green ivory navy orange pink purple reception red silver teal white wine glass yellow Candle - Craft ~ Your ~ Home