
Sugar-free sweetener syrup is a simple-syrup-style liquid sweetener made without sucrose, using low- or no-calorie sweeteners.
Sweetness without sugar is the point, and the trade is texture: sugar gives a syrup its body, and a sweetener does not, so the drink comes out thinner however sweet you make it. The other variable is what happens in the cold — some of these crystallize out and some stay in solution.
Conventional simple syrup
Sucrose carries the body as well as the sweetness; swapping one for the other changes the weight of the drink, not just its calories.
Erythritol, stevia and allulose syrups
Sold interchangeably but not interchangeable in a cold glass: erythritol recrystallizes, stevia carries a distinct aftertaste at higher doses, allulose behaves closest to sugar.
Bulk sweeteners — erythritol, allulose — give a body close to sugar’s, while high-intensity ones like sucralose or stevia sweeten and add almost no body.
Refrigerate. How long it lasts depends on the sweetener rather than on the syrup — weeks rather than months, and none of them have sugar’s preserving effect.

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Vodka Sour (low-calorie)
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Whiskey Sour (low-calorie)
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Bloody Mary (low-calorie)
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Mojito (low-calorie)
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White Lady (low-calorie)
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