I grew up on the whipped topping that you buy frozen in the tub, when I was a kid it was all I knew. I didn't know that it wasn't real whipped topping until I was an adult. Once I found out how easy homemade whipped topping is to make, and how much better it tastes, I never went back to the old stuff. I bought a pint of heavy whipping cream for $2.39 and it makes at least the equivalent of one full tub and a little more so cost wise it's a little more expensive than the tubs but so worth it.
This is all you need to make one batch: 1 cup heavy whipping cream, 2 Tablespoons Sugar (you can omit the sugar if you want) 1/2 teaspoon vanilla. Try to chill the bowl you are going to mix it in ahead of time, you can use your hand mixer and just mix on medium until it gets fluffy or put it in your Kitchenaid mixer and let it go on medium until it gets fluffy. I know it's easy to just buy the tub or spray can but these few extra steps are worth it and you know exactly what ingredients are in it!
Check out my post I made my own butter using heavy whipping cream!