I always have fun when I can make things that are dripping in blood! These vases are really easy to do, and I've also done votive candles, too. All you need is some red acrylic gloss paint, a few glass vases or votives, some paint brushes and paper towels.
Slowly drip the paint along the edges of the vase, using a thin paint brush to make globs and drips. If you need to, dab with a paper towel, if the drip smears. Another thing that's great about working with acrylic paint on glass....if you don't like how it looks, wait until it dries and then just "peel" it off, and start over.
Add some dried flowers or white candles and you're all set!