These are a bunch of home-made bongs from vases.
To drill glass, you have to use a glass bit. A high rpm Dremel works better than the cordless type.
You have to keep the vase under water of the glass will crack from overheating and your bit will get dull.

I have to say I have never seen a vase with a convenient hand-grip of the sort normally reserved for bongs... I'm tempted to go with the doubters. But looking at the 'bong project'... maybe it's legit; if so, it's cool.