Diet Mtn Dew SodaStream 14.9 fl oz (About 1 1/3 Tbsp) 51 mg Diet Pepsi 7.5 fl oz (7.5 fl oz) 22 mg Diet Pepsi 12 fl oz (12 fl oz) 35 mg Diet Pepsi 16 fl oz (16 fl oz) 47 mg Diet Pepsi 16.9 fl oz (16.9 fl oz) 50 mg Diet Pepsi 20 fl oz (20 fl oz) 59...