Better than just a plain candle light, I have done this with a nail and a hammer :) It does turn out this pretty (if you don't bend up the can by hitting it with the hammer.Woops) Can use tap light with kids instead of candles.
DIY Craft Project: Sharpie Mug Tutorial - Custom heart handle mugs that require no artistic ability or transfers! If you can trace and make dots you can make these mugs! Learn the easy hack! Uses oil based Sharpie paint pens that are baked on.