How do I make a glass vase beautiful?

Here's a really cool idea it can be used on any glass even lampshades,globes, pendant lights even on windows that you need to make more private as long as they are clear & if it isn't going to get wet. https://www.unoriginalmom.com/mod-podge-and-food-coloring-painted-glass/

Or use a stencil and a dremel for a etched look. You can personalize each vase depending who you are giving it too. Kittens and puppies for kids, leaves and stems for flowers, or hobbies that the recipient is into.

You can also use a few drops of food coloring in a bowl of Epson Salt, Apply ModPodge with a foam brush to the vase then sprinkle on the colored Salt. Let dry for a day then seal.

Hello, Marbling medium is another alternative suitable for glass—if you wish a swirly drippy effect.