Do people lift heavy enough when asked to self select weights? Biolayne Heavy Duty Polypropylene Shallow Storage Box Extra Large (40 L) Weight 1st Grade Math Class Ace Light And Heavy Objects. A sturdy and durable shallow storage box that can be used both indoors and outdoors. The shape of the lid is designed so that it does not slip even when stacked and is easy to use as a table or stool. Convenient for storing small every day items such as dishes, cutlery, small goods, etc. or long term storage for seasonal items in the closet or garage. The lid can be locked by using the handles as a latch, so dust and small insects are less likely to get in. Easy to hold handles makes the storage box convenient to carry when organizing storage or bringing it for a picnic. Recommended for camping and outdoor activities.