Unwanted Food or Drink Products - Once supply conditions are broken, there are a number of factors outside of our control that can affect the quality of a product. Therefore perishable goods such as food and drink cannot be returned. Electric blankets are ultimately more cost-effective during the winter as they cost less than putting the heating and heating a whole house. how do electric blankets work? An electric blanket has a plug in that when turned on, the electricity is transformed into heat through the cables that are running through the blanket. They also feature a thermostat which regulates the temperature. how safe are electric blankets? For reasons of hygiene and safety, personal grooming products, cosmetics or items of intimate clothing cannot be returned.