Whether you prefer coffee or tea, the right mug can make your daily ritual a lot more enjoyable. Unemployed Philosophers Guild specializes in making quirky coffee cups inspired by nature, astronomy, and art, many of which display another image when you pour a hot beverage into the cup.
The Birds on a Wire mug, for instance, combines the relaxing pastime of birdwatching with a classic mug design. When it’s empty or filled with a cool beverage, it features a striking black silhouette of 18 birds on a wire. But if you add a hot liquid to the mug, the illustration will slowly transform from black to a vibrant spectrum of color before your very eyes. Then, when it cools again, it will return to its normal state. Each species of bird is completely unique, so the challenge is to name as many as you can before their colors are hidden.