I had several clients that wanted custom dental retainer cases that they could give out to their patients when they were provided some type of wearable dental device. Each case was customized with their business logo on the top, and a QR code linked to their website on the bottom. Some of the clients wanted custom textures on the side of the cases. The cases themselves were printed in a glow-in-the-dark material. And the inside of the bottom-half of the case was coated in epoxy resin to ease in cleaning. These retainer cases were a great way for the businesses to advertise! These cases were printed in PLA.