are lower resilience, higher weight (6.5 to 13 g per litre/0.4 to 0.8 lb per cubic foot), dust creation, potential attraction of rodents, and higher price. While polystyrene peanuts are soluble in acetone, starch-based peanuts are soluble in water, so starch based products can be disposed with down the sink, dissolving on contact with water. See also Cushioning Packaging and labeling References General references Yam, K. L., Encyclopedia of Packaging Technology, John Wiley & Sons, 2009, Packaging materials