In many countries of the world, there has been a phase-out of lightweight plastic bags. Single-use plastic shopping bags, commonly made from high-density polyethylene (HDPE) plastic,[1] have traditionally been given free to customers by stores when purchasing goods—a popular method considered a strong, cheap, and hygienic way of transporting items. Problems associated with plastic bags include use of non-renewable resources (such as crude oil, gas and coal),[2] disposal, and environmental impacts.