I’ve been waiting to build a test wall for a few weeks now. 10 ft long, 6 ft high. Actually, I have no idea how this wall will go together. I tested some silicone caulk a few days ago and it held tightly. But you know what happens when you step into the unknown, right? In my studio I set up a cardboard jig to hold the bottles. I decided to build it in place, as a wall, in two 5 ft long sections. Good thing I had some corrugated cardboard that I rescued from the movers. A few big pieces yielded enough to setup two side forms and a base. I marked these off at 1 ft increments. I started going through the bags of bottles and realized that most of them still had labels and were filled with a bit of water from the cleanings. So I labored through label peeling and emptying each bottle as much as I could. Finally I had a pile of about 100, and started gluing them together. I soon discovered that there is an art to all of this, and that to properly glue bottles of varying shapes and sizes you had to do a little fitting and finagling, I suspect like a stone mason building a wall. Each bottle needed to be fit to see where the contact points were to adjacent bottles. You can’t just glob a mess of caulk like mortar, that stuff is expensive! After about two hours I had about 2 ft high of wall built.