I'm such a sucker for simple and colourful decorating ideas and these upcycled glass bottle vases (link) really take the cake:
Okay, so the blog I got these off of may be in Spanish, but you don't need to be bilingual to do this project! Just collect yourself some bottom from the recycling (or thrift shop), grab the paints, and get mixing and pouring! Woo hoo! I think these would be especially lovely filled with pom pom bouquets too! Oh my! What do you think?