>>3621666I just use old rolls I've shot before. If that's not an option go with the generic plastic ones, I've had both the plastic and metal reusable canisters and the plastics ones are more durable
https://www.bhphotovideo.com/c/product/86473-REG/Kalt_NP11137_1_35mm_Cassette_For_Bulk.html/DFF/d10-v21-t1-x276715/SID/EZ