A residential customer's energy bill consists of two parts – supply and delivery. The customer can purchase energy supply from either an Energy Supplier Company (ESCO) or your local electric/gas utility. The delivery portion of your energy service will continue to be provided only by your distribution utility. There are many ESCOs providing a wide variety of “products” and price options. Some provide long-term fixed prices; others offer variable rates that change with market conditions; others give the option for customers to lock-in a rate during certain peak months of energy use. Some ESCO service is provided at a variable price on a month-to-month basis that can be cancelled at any time. In other cases, ESCOs require customers to enter into a contract for their purchase of electricity/natural gas. In some instances the contract requires the customer to commit to purchasing its energy from the ESCO for a specified period of time. The consumer selects the choice that’s best for them.