These are my absolute favorite vases to work with. Anything I put in the top no matter how huge.. was above the guests heads and never in the way. the weighted bottom made top heaviness obsolete. and they shined up beautiful but didnt break like all my glass vases that my husband would break almost every wedding. The bottoms do unscrew so stacking them inside of each also saved a ton of space. This is the best investment I think you can make if you include centerpieces in your decoration packages. We have lots of training videos on how to create the different type of centerpieces that you see in the pictures. If your putting live flowers in them and using water, I recommend you get epoxy from your local hardware store and seal them up first and then pour water in them to test them out before using them on the event day.. some of sealed good but some are not.. so just sealing them all would be a great idea and is what we always did when we added more of these to our inventory.