Diet soft drink
Recently two other sweeteners, sucralose (marketed as Splenda) and acesulfame potassium ("Sunett" or "Ace K" (the K is the chemical symbol for potassium) which is usually used in conjunction with aspartame, sucralose, or saccharin rather than alone) have come into growing use, particularly by smaller beverage producers (e.g. Big Red).  Diet Rite is the non-aspartame diet soda brand with the highest sales today; it uses a combination of sucralose and acesulfame potassium.