Curly and possibly scratched, but if you get a roll of poly sleeving or whatnot, the one that holds one continuous strip you can slide the negative in that and roll it into a film can. I've done this at a lab, it's not an unreasonable way to keep things temporarily or on the short term.
A lot of people would bring in shoe boxes of negatives rolled up in cans like that, more than one 'pro' did that, even stuffing 120 rolls into 35mm cans without the lids even.
For me, the best method i've found are print file pages with hanging file bars inserted in the top with all of my negative pages stored in a rubbermaid hanging file box. Keeps them dry, dust free and neat.