Lithophane Holder with LED Light. For Lithophane with 26-28mm curvature. Printed mine in PLA.
https://www.ebay.de/itm/6-12tlg-10LED-Flaschenlicht-Korken-mit-LED-Lichterkette-Weinflasche-Licht-Akku/254469626238?hash=item3b3f92597e:m:m7TZazlUY3kBOY2nPiEJqMQ