Look at these badass guitars! They’re not only freaking awesome—they’re also 3D printed. 3D printing is the process of creating solid objects from a digital file, and it’s an “additive” process because the objects are built up layer by layer instead of the more traditional “subtractive” process of cutting and removing. There was no wastage in creating these guitars: the printing involves a gradual layering and bonding of the base material, such as plastics, ceramic and metal. 3D printing is currently pretty slow and was originally only used for prototyping, but as the technology improves, it’s becoming more widespread. Eventually, you might not have to wait for a spare part to come in—your local store can just get the digital 3D product design and print it right out for you, or sell you the design to print out yourself. Imagine the savings on shipping!