Design for the ever magnificent Bleep.com. T shirts bags and stickers available here. Have a look out the other designs too. They are all very nice. I particularly like the Sawdust one.
In my design the silver colour represents water. Water coming to our planet on a bunch of comets and then water dwelling underground in humungus aquifers. Both things that are a very big part of what water has been up to in the last 5 billion years but that you don’t tend to think about so much when you are thinking about water.