Recommend a Hard drive caddy, for use between MACs and PCs

[mrtruesdale]

I've started a digital film course and need to shift my saved footage between my Mac in school and PC at home. I have a couple of old hard drives sitting around so I'm thinking a caddy might be the right idea.
What do I need to look for in the specifications etc? Any reliable brands?

Thanks in advance.

Mark Truesdale