Question: It is larger enough to to fit a pair of sneakers and especials in? I'm using it for a work bag

Answer: If you artfully put in the sneakers and depending on the size, maybe. Not sure what especials are so can't tell you if they'll fit.Great for a work bag. 

 

Question: Is able to be a school bag

Answer: Yes,it large to put in a book

 

Question: I want to use it for travel. Is it big enough for a bottle of water and small blanket and a small cosmetic case?

Answer: Yes, it can.