Energy is one of the largest and most significant ecological concerns, both economically and environmentally. The rising demand for electricity has led to higher costs, along with a dramatic drop in the quality of energy supplies. Fortunately, there are ways to deal with this issue. Using multi-layer "Stackable Round Transparent Heat Food Cover" can help you negate the cost of wasted energy by utilizing your household appliances more efficiently than ever before. Through its unique design and construction, this reusable food cover will reduce wear and tear on your appliances due to temperature fluctuations and reduce energy consumption by as much as 80%!