Customise this mug with your favourite picture or photo. However, it will be even more special thanks to its magic effect. At first sight, it seems to be an ordinary black mug, but when you pour a hot drink into it, the image gets revealed. WARNING: the mug is not suitable for the dishwasher, but it is microwave safe. Important: if you design the template with a Spotify wave code, remember that this is a curved product. Concretely, if you stretch it too much, it may not be read. For the mobile camera to recognise it, it has to scan the whole code from an angle, so we recommend that you don't turn it around too much.