As the name suggests, top bags are made to ride atop your load and serve as a handy daypack for all the many things you could need throughout the day. The topside and zipper are fully open for ease access, and the are fastened to the toboggan from the bottom of the bag.Spouts are highly adaptable and can accommodate a wide variety of liquids, including juices, sports drinks, energy drinks, wine, and pre-made, custom cocktails that can be kept in the fridge. They are also easily transportable and storable due to their physical flexibility. Duffle top bulk bags have a thin lightweight top panel that is the same width and depth as the four sides of the bag.