Surprise mugs are just like a standard mug but as the name implies, they have a hidden secret. When they are filled with a beverage the surprise is hidden. Once the liquid inside reaches a certain height the surprise is revealed!
Here's an example of the exterior of a really cute frog surprise mug:
And here's the secret it hides:
Look at this awesome Krispie Kreme surprise mug:
And here's its surprise. Yes, that's a donut!
We have many surprise mugs here at Mugbarista.com. Please use our search engine to search for the word surprise to see them all!