A while back my bucks destroyed their black two compartment mineral feeder to the point that I was zip tying the broken feeder back on the wall. All the designs online I looked at seemed too big for my set up. I only like to put out as much as they will eat or it becomes mushy in my temperate rainforest climate. So I went to Lowes and found these pvc end cap thingies, made a wooden box around them and just set them in. This way I can clean them too! I have been super happy with it and it is as sturdy as heck! No more coming in the barn in the morning and seeing the broken mineral feeder on the ground. I think the PVC pieces are 4in x 4in x 4in dia cap PVC fittings. $9.40 each on Lowes website. Cullen loves his mins. Here's what the individual piece looks like. I don't have it secured to the wood at all, but you could if you wanted to. You could also make it as large as you wanted to, to accommodate lots and lots of supplements.