Centerpiece ideas for people that don't like centerpieces. Ideas please!

Hi! My fiancé and I are marrying on June 21st 2014. Everything is going great other than centerpieces. We have no idea what to do because neither of us really like centerpieces. I feel like cut flowers are usually a waste of money. Does anyone have any ideas ? Preferably budget friendly diy and/or outside of the box. Our wedding colors are aqua/teal and purple. We do not have an actual theme. Thank you!