I am not really a big fan of the average size water bottles but much prefer the little ones because they won't go warm as readily which means they won't have to be dumped out and be wasted. These guys are just great! Perfect for me! None are scattered about, left around as some people tend to do. Mine are drank and bottles recyled with not a dime wasted or a drop not drank. One bottle will last half an hour or more. Great to carry in bag. Takes up little room in frig. Did not know how much better off these are until l tried them out. They never get that old awful taste of being sitting around in frig. Some people assume these are a waste but they never tried it and they are quite mistaken ! Believe me, It is a waste the other way around! How much water do you in take during one sitting? Remember I don't gulp. I sip water.