Most listings use plastic (clear or colored) for bases and lids. There are also fabric or cardboard bins with polyester/linen construction and at least one food container made from recycled PET. Lid materials mentioned include polypropylene and TPE.
Many items include handles, contoured grip areas, or built-in comfort-grip handles and are described as lightweight or portable. Several listings explicitly note they are easy to lift, transport, or carry.
Capacities range from small food/travel containers around 2.8 quarts up to large storage bins at about 56 quarts. Several mid sizes (for example 6-quart and 30-quart) are also shown.
Yes; some listings show both outside and interior bottom measurements. Examples include: outside 18 5/8" × 14" × 11 1/8" with interior bottom 15" × 9 7/8" × 10 3/4"; outside 22 7/8" × 16 5/8" × 12 3/8" with interior bottom 18 1/2" × 12 5/8" × 11 7/8"; and outside 13 1/2" × 8 1/8" × 4 5/8" with interior bottom 11 1/2" × 6 3/8" × 4 3/8".