Sodastream Diet Energy Sodamix Syrup-Specialty Flavor One 500ml bottle of concentrated Sodamix. Makes 12 liters of soda, the equivalent of about 33 cans. Save the earth from countless plastic bottles! All SodaStream regular sodamix uses a mixture of Splenda and sugar. Diet flavors are sugar-free, sweetened with Splenda brand sweetener You pay just pennies per glass of delicious sparkling soda!