We've seen many people use food as 3D printer feed in the past, such as chocolates, candies and even ice cream. But can you imagine 3D printing anything using bananas? Sounds hard, if not, well, bananas -- but 3Digital Cooks' founder Luis Rodriguez Alcalde isn't one to shy away from a good challenge. So, for his latest project, he explored how to print out solid objects using banana mush and his self-designed extruder for 3D printers called PLYUMP. As you can imagine, pureed banana can't hold shape on its own, so Alcalde had to use potato starch as a thickener. His first attempt ended up lumpy and brownish, and honestly, quite terrifying to look at.