A small bag of soil comes with each Bullet Bouquets arrangement. We use a mixture of .22LR, .22 Short, .22 WMR, and .17 HMR empty brass as soil. It is not glued in place so you can have fun adjusting it.
We've experimented with using different spent brass cases for the soil, but in our opinion, the .22 brass looks far better.
If you are concerned about your bouquet tipping over and the brass spilling out, you do one of two things:
1. Get the billet aluminum flowerpot, because it is heavier than the terracotta flowerpot, and also has a wider base. This gives you a lower center of gravity, and also a more stable platform.
2. Mix up some two-part epoxy and apply tiny amounts to the 10-12 pieces of brass in the very top layer of the soil. You only need to add the epoxy where the top layer touches the soil layer underneath, and a couple of places where it touches the inside of the flowerpot. Your soil is now glued in place!