First off, man I LOVE your blog! It's been a source of inspiration for 3+ years. I've been thinking about glass for a while -- very Eco-friendly waterproof container. I'm also interested in clay (especially if you get more robust growth). 1) Do you use a wick? What's the material? 2) What's in your nutrient solution? I could see a row of SIPs made from large 1.5l wine bottles that would look nicer than anything fro 2l soda bottles. More artsy, less frugal chiq.