A:Answer The SLUSHi machine can be used with diet drinks, but sugar or a sugar substitute must be added to ensure the mixture freezes correctly and achieves the proper slushi texture. Diet drinks alone lack the necessary sugar content, which can cause the liquid to freeze too solid and potentially damage the machine. For best results, always include a sweetener like allulose when using diet beverages. Sweetener need at least 4% sugar for the right texture.
