Wedding centerpiece anchorage?

Are the three containers at the bottom individual or are they one piece? If they are separate pieces maybe consider removing one to make it less top heavy. If they are one piece I would add some grippy something to help it from falling over - maybe like drawer grippy roll. I think you can find a roll at the $1 store.

The grippy stuff would go under the whole centerpiece. A small square on the table and the centerpiece onto of it.

I agree with Ingrid about grippy roll (I think it's actually marketed as drawer liner). Or you could do those picture command strips with the velcro maybe?