We spotted this fun mug at the 2013 Toy Fair yesterday. It’s the Build-On Brick Mug, compatible with Lego and other similar blocks (not included). Whatever you’re feeling for the day, stick on Lego pieces and figures to match your mood. Would be fun to rearrange the pieces during a boring meeting instead paying attention. BPA-free. Not microwavable unless you like melted plastic (and who doesn’t?) Fun mug.