What Material to Print 3D Mold In?

I was trying to use craft cloud and I was wondering material for them to print the 3D model in?

PLA or ABS should be sufficient. If you plan on it being outside a ton you might step up to ASA. ASA would be probably an ideal choice if it costs little to nothing more just because it will resist UV degradation more so than PLA or ABS. I was going to print a custom design in ABS, but my printer for ABS is currently giving me a lot of issues, so I plan on using PLA first.