No true foodie would ever touch Cool Whip. It’s just fundamentally against nature. If you want great whipped cream that’s sugar-free, get some heavy whipping cream (raw is best if you can find it) and whip it up in your mixer with 20 drops of clear Stevia per pint. You will never go back to whipped cream in a can again. You can also try the flavored Stevias, although I haven’t tried that yet and can’t recommend any particular flavor.
Tip for perfect whipped cream: Put the mixing bowl in the fridge for half an hour before using it to whip cream. A cold bowl does wonders, don’t ask me why.