The (iPhone 4 and 4S; £20) comes with a handy erasable tablet on the back for taking notes, drawing doodles, and generally keeping yourself entertained when you’ve had enough Angry Birds for one afternoon. The case is available in red.

This company’s specialty is (iPhone 4 and 4S; €38 to €48) printed using a three-dimensional technology that brings together a series of patterns and designs. You can even add your own text, which is worked directly into the design when your case is printed. Kees’s cases are available in white, black, grey, red, blue, or pink, and in a variety of materials and textures.

The (iPhone 4 and 4S; €39) is a set (front and back) of stick-on skins made entirely of wood using a special process that makes the material resistant to water and dirt without impacting its natural feel and color. As a bonus, part of the profits from the sale of this case go towards projects that aim to restore lost forests throughout the world. The Lastu is available in oak or walnut, with optional engraving.

The (iPhone 4 and 4S; $35) is a case that protects your iPhone using shatterproof, Lexan-polycarbonate construction, while making it easy to carry the phone thanks to a stylish clip. The case comes in solid black or grey, or in translucent clear, pink, lime, blue, smoke, or orange. The base package includes the case and belt/pocket clip, but you can also buy a and a .

The (iPhone 4 and 4S; $30) is in many ways your typical iPhone case: sturdy, elegant, sleek, and available in multiple colors (in this case, black, white, or pink). What's unusual about it is the fact that it sports a very… pocket that can be used to hide away a particular thing or two, as the many puns on the company's Website clearly illustrate.