MED GRANITE. Size = The Billabong Water Bowls are just some of the great products we are stocking from the Billabong Collection. These natural looking water bowls are made of high quality durable poly resin, which makes them easy to clean and long lasting. They have also been designed to prevent tipping over. The range is available in small, medium, large and extra large as well as three sized corner bowls so there is one to suit all types of reptiles; these bowls also come in three natural earth tones - granite, sandstone and brown. Recreate Australia's natural environment with a Billabong Bowl.