Thanks for the vote of confidence on our Mackintosh house numbers. I want to clarify, however, that they are made of pewter, not aluminum. We cast lead-free pewter in-house at our facility, using 100% wind power to melt the pewter, heat and spin the casting machine, and to finish the pieces (we use 100% wind power for everything we do in-house!). We offer lots of other beautiful pieces in 100% recycled cast aluminum and 90% recycled cast bronze. We strive to make our products durable, easy-care and so cool and gorgeous that they will naturally stay out of the waste stream generation after generation. Now that's sustainable!