Storing an inner tube I got a spare inner tube with my bike, which is good.  

I checked how it was packed and found it was sticking somewhat when I pulled it out of the box, which I can only imagine is bad.  

Would it be an idea to put someething on the tube for storage, talcum powder maybe?
I always carry a tube with me in my backpack on longer tours. I left it in the packet I bought it in, but only to protect it from being punctured by the other stuff I carry in the bag (eg a Leatherman and keys).

I doubt that this is necessary but with or without the carton, the tube fits perfectly at the bottom of my Camelback, and the bit of added weight doesn't freak me out, too.

There never was talkum on the tube, and it is a pretty expensive tube, so do not worry about that.