The hobo bag. It's really big. I use it as a mom purse. This means not only do I carry around my purse stuff (wallet, keys, phone, calendar) but I also carry diapers and wipes. It has a handy elastic loop that fits a sippy cup perfectly and it doesn't spill. I'm also able to fit a fully packed lunch box in it. And while I'm eating my lunch, I can fit a full ssc in it. For real, you need this!