Its 20 oz when Hot as Venti means 20 in Italian. Although for cold beverages its 24 oz. Same is for Trenta cup, as Trenta means 30 in Italian. Trenta cup is reserved for cold beverages in Starbucks. Trenta cup = 30 oz cold beverage.
A utility bill would be a bill for your water, electric, gas, etc.
public utility. n. A private business organization, subject to governmental regulation, that provides an essential commodity or service, such as water, electricity, transportation, or communication, to the public. public utility. n. (Commerce) an enterprise concerned with the provision to the public of essentials, such as electricity or water.