Custom Pint Glasses

I would like to make about 50 glasses per liter using a bit of art I did. Art is a color. I saw pad printers and screen on eBay and wondering if this is the best approach. If anyone has used one of these that let me know how it happened. In addition, other ideas?

For a drink that will be washed and processed much you'll need to use acrylic enamel on glass. It should be in heat when you have finished painting for durability. I do not think there is a printer on the market that uses this type of ink. Maybe you could make a stencil and apply the design this way. Also, you may be able to find online somewhere that would be less expensive than you can use your artwork ... I know a few people who has a cheap pint glasses that wedding favors.
Good luck!