"Why not just extrude the profile instead of 3D printing it? The customized parts will still need to be printed on or near the site but the longer profiles should be more affordable as extruded lengths."

"This system is actually the standard in the entire Netherlands, not just Amsterdam. There are even areas where you do not pay a fixed fee per year for garbage collection. It is instead based on the amount of drops you do using your RFID card. The only drawback is when a bag gets stuck in the roller door or it malfunctions otherwise, most people tend to leave their bags next to it instead of lugging it back home. (That's what all the stickers on the thing are about) Another cool feature is that some of these feature a small door on the rear where you can drop small bits of trash in without needing an RFID card."