No. 7 is made from a cutting disc, rusty saw blade, metal pipe, garden hose connector and a coffee percolator that's filled with broken tempered glass (it's not sharp at all). The blossom is mounted to the can, so you can easily exchange the glass for sand, dirt, nails, screws ect.
Pros: They are made entirely of found/recycled objects. They never need water. They are always in bloom. They don't attract bees.