A cocktail umbrella is a small thing that looks like a little umbrella that you might use to stay dry when it is raining outside. But the difference is that this umbrella is just for decoration, and it goes in drinks that grown-ups might have at a party or a bar.
When you get a special drink from a grown-up, you might see an umbrella in it. This little umbrella is to make your drink look pretty and fun. Plus, it keeps the sun off your drink, so it does not get too hot. You can also use it to stir your drink, like a tiny spoon!
Cocktail umbrellas come in lots of different colors and designs, like polka dots, flowers, or even little animals. They're usually made of paper or plastic and have a little stick that you can stick into your drink.
So if you ever see a little umbrella in your grown-up's drink or at a party, now you know that it is just there to make the drink more fun, and you can imagine all sorts of adventures the tiny umbrella could go on if it were real!