This bag was super cheap. It's lined with some kind of thin polyester and has a zipper at the top. It seems moderately sturdy and will probably hold up.

My only complaint is the color. I didn't see that this bag was silver in the bottom description, and DO THEY MEAN SILVER! The skulls are metallic silver -- lots of shine and bling. I was going to use this as a purse. I'm not sure what to do with it now. Oh well, it's still super cute and functional. I wish the skulls were white. Oh well.