FDM-printing is a technique most often used for 3D printing. It uses molten plastic through a nozzle moving over 3 axes to create any creation. This is also referred to as Additive Manufacturing. At Makersplayce we have 6 FDM-Printers and use different colors filament. We mostly use PLA, but one Printer is always loaded with PETG. PLA is a very simple plastic which is easy and reliable to print. Sadly, it is not hydrophobic, meaning it is not water resistant. PETG is hydrophobic, and is still safe for food or medical use, it does come with the downside of being more difficult to print.