Made a humidity dome for seedlings and clones. Can fit a rooting cube and a little bit of soil to go around the rooting cube. Perfect to get roots established and then transplant into the final pot. Must cut two-liter bottle at the transition point between funnel and body. Can use both halves of the bottle depending on the size of the clone/seedling. If you use the side with the bottle top, can burp out humidity without removing the bottle from the pot. So far has worked with coke and dr.pepper bottles. Dimension is based on the label portion of the bottle, which I believe is pretty standard across brands. I'm pleased with the results and am gonna make one for 3-liter bottles soon.