“This adjustable mould box is able to be between 8.5 square centimetres and 2 square millimetres. To use it, simply print it out (as fast as possible, quality and speed don’t really matter), adjust the size, pop on the clips and line the box with tinfoil. Do this with care as not to puncture the foil and let your silicone or other material leak out. Visit http://tinker.zoxxoz.com/Pages/blogpost-4.html for more information.”