So this bottle is pretty unusual. it's large which isn't the easiest for travelling but that is mainly because it comes with this compartment where you can store things. To tell you the truth this is why i bought it. however, i dont think it serves it's function. I really want to put my keys there, never cash or credit cards. i just dont feel like it's a safe spot to hold anything, even keys. Thats my only beef with this, other than that great size! no spilling either as of yet!