I briefly added fruit, ala 1950s, but I prefer without. Occasionally with wHipped cream, but that takes effort since I don’t like the garbage that the spray cans create. (whipped cream, sugar and an electric mixer).
1 box makes ~750ml / “one fifth”, which is enough for 3 snacks, imo.
The issue is the amount of sugar in them (and the whipped cream). Using sugar-free versions is good.
Using a whipped cream maker, with NO2 canisters for some calorie-free sweetness, is nice.