Recommend the 4.0 Cubic Foot box for packing large bulky. lightweight items. For example: pack up the linen closet, great for packing/storing all those towels, sheets, comforters. Kids won big plush toys at the Town Fair? Pack that fluffy life-sized My Little Pony family in here (but remind your customers to punch breathing holes - we don't want any My Little Pony fatalities now, do we? (Yes, we're just joking)