Yes these are the much loved and feared "Packages" from the WheelWod Games 2019. These look all nice and easy....till you go to lift. The Package is made from foam that encases bladders making the box dynamic weight. Mimicking picking up different boxes, laundry, coolers etc. this function movement with the package turned out to be one of the favorite events. Comes with 1 water bladder. You can fill it with 0lbs of water up to 40lbs of water.