Caulk gun-like dispenser for whipped cream

My suggestion would be to use a piping bag. You can get various tips so you can change up the swirls and lines as you like.

Added by Jolenealaska:

I hope you look at the comments and all of the answers here. I have used both pastry bags (many times), and a caulk-gun thing once before I threw it away.

Disposable bags are not expensive unless you use a lot of them. And there is no clean up, 'cause you just throw them away.

The caulk gun looking thing is cumbersome and a pain to clean, pastry bags are a much better option. I realize that is a subjective thing to say, but there is a reason you never see pastry chefs using the caulk-gun thing.

Different tips give different results.

A coupler makes it easy to change tips or to use the same tip for different bags (colors).

Then you just throw the bag away and wash whatever tips you used.

Disposable Pastry Bags, 100 count

You can even just snip the end of the bag and not use a tip at all. You can do that with a baggie too, but a pastry bag will give you more control.

The chaulk gun for kitchens is called cookie press and looks like this:

I know that some use it to decorate cakes and with whipped cream, too (some come with decorating tips, some don't), but IMHO it's a wiser idea to learn how to handle a pastry bag - the results will be better with sufficient practise.

But if you should have problems with your hands or simply love all kinds of "machinery", the cookie press might be an option worth checking out. You can either "pull the trigger" for a pre-defined amount or unlock it and simply push the plunger.

While a cookie press would at least have the nominal excuse of being multi-purpose¹, it's... awkward to use for icing/whipped cream. What you might have been thinking of is an icing syringe (aka piping syringe, cake decorator press, or various non-informative names like "Dessert Decorator Pro").

While a decorating bag is vastly more useful, not to mention easier to store, an icing press can be useful for utter beginners and/or those with very hot hands who tend to melt the contents of decorating bags. Just make sure to check the reviews thoroughly, because some presses are so shoddily made or badly designed that they're worse than useless.

_{¹ Note that in my experience, a cookie press sucks at making cookies, making it a zero-tasker. Technically, that doesn't break Alton Brown's "there's only one uni-tasker allowed in the kitchen" rule, right?}