The idea is to prompt people to reconsider what to do with their household waste, re-using discarded material to create something new and advertise Brisbane's Tip Shops.

Ms Robertson is a professional mosaic artist and teacher, working with tiles, china, bottles, ceramics, stone, slate, utensils, beads, shells and mirrors.

Her competition piece Here Comes the Bride is a dressing table with a flamboyant array of items decorated with mosaics.

With 90 percent of the materials coming from the Acacia Ridge Tip Shop, Mrs. Robertson was inspired by the dressing table she picked up for $70, which made her reminiscent of her own wedding.

"Since I saw the dressing table it took me back to when I got married in the '74 floods," Mrs. Robertson said.

Further inspired by the eccentric nature of weddings in Las Vegas, the dresser includes an old dunny transformed into a wishing well, a mirror with Empress Theodora embossed in mosaic and a tier of whimsical concrete cupcakes.

Lord Mayor Graham Quirk says the competition aims to encourage sustainability through artworks, recycling trash and turning it into treasured pieces of artwork.

"The Tip Shop Art competition is about demonstrating what a cleaner, greener Brisbane is all about - recycling and reusing unwanted homewares and household items, rather than them ending up as landfill," Cr Quirk said.

The finished pieces will be displayed at the Brisbane Square Library from May 1 to June 30, where the public can vote for their favourite.

The artist with the most popular vote will receive a $1000 prize.