Tomato Pasta Soup Thermos Lunch That Stays Warm

Name: Tomato Pasta Soup Thermos Lunch
Prep time: 5 min
Total time: 5 min
Ingredients: 1 cup veggie tomato soup; 1/2 cup cooked macaroni pasta

Recipe

This post may contain affiliate links. Read our disclosure policy here.

Turn leftover tomato soup into a filling thermos lunch with pasta. Learn how to pack it for school, keep it warm, and prevent soggy noodles.

If your kids love tomato soup but need something more filling for school, adding pasta is an easy solution. Here’s how to pack tomato pasta soup in a thermos so it stays warm until lunchtime.

Tomato Pasta Soup Thermos Lunch

Laura Fuentes holding a stack of lunchboxes and a school lunch bag

My kids have always loved tomato soup, especially with grilled cheese. But on mornings when I don’t have time to make a grilled cheese sandwich, I add cooked pasta I made ahead for a pasta lunch. It makes a more filling lunch without giving me another thing to prepare.

My kids love this pasta + tomato soup combo, so much so that sometimes I use tortellini instead. Both reheat beautifully the next morning, and the result is a warm lunch they already know they love.

How to Pack Tomato Pasta Soup in a Thermos for Lunch

Preheat the thermos
Fill the thermos with boiling water, close the lid, and let it sit for 5 minutes. Warming the inside helps prevent the container from pulling heat away from the soup.
Heat the soup
While the thermos warms, reheat the tomato pasta soup on the stove or in the microwave until piping hot. If you’re starting with plain tomato soup, stir in the cooked pasta before reheating.
Fill the thermos
Carefully empty the hot water and immediately add the hot soup. Close the lid tightly to minimize heat loss and prevent leaks.
Pack it for school
Place the thermos upright in the lunch bag with a spoon. Pack the veggies and Ranch dressing in a separate container with an ice pack to keep the cold sides chilled.

tomato pasta soup in a thermos and a lunchbox with veggies and ranch

Laura’s Thermos Lunch Packing Tips

Can I use leftover tomato soup?

Absolutely! Leftover tomato soup is my favorite shortcut for this lunch. Just add ½ cup of cooked macaroni to 1 cup of tomato soup and reheat everything until piping hot. The pasta makes the soup more filling without having to prepare another lunch from scratch.

Will the pasta get mushy in the thermos?

The pasta will soften a little as it sits in the hot soup, but it shouldn’t become mushy by lunchtime. I prefer adding cooked pasta to the soup when reheating it in the morning instead of leaving it in the broth overnight. This helps the pasta hold its texture.

How do I keep tomato pasta soup hot until lunch?

When packing soup in a thermos, preheat the container with boiling water for 5 minutes and fill it immediately with piping-hot soup. Preheating reduces heat loss, and closing the lid right away helps maintain the temperature. Choose a thermos that keeps food at a safe temperature until lunchtime.

Can I pack hot soup and cold sides in the same lunch bag?

Yes! You can pack hot and cold foods in the same lunch bag by keeping the thermos separate from the chilled items. Place the ice pack next to the veggies and dressing, away from the thermos, so it doesn’t pull heat away from the soup.

What should I pack with tomato pasta soup?

I usually pack crunchy veggies with a little Ranch dressing because they balance the warm soup and are easy to prepare. You can also add fruit, crackers, or another of these easy school lunch sides if your child needs a little more food.

Tomato Pasta Soup Thermos Lunch

Servings: 1

Prep Time: 5

Total Time: 5

Turn leftover tomato soup into a filling thermos lunch with pasta. Learn how to pack it for school, keep it warm, and prevent soggy noodles.

5 from 10 votes

Print Pin

Ingredients

For the tomato pasta soup:

1 cup veggie tomato soup
½ cup cooked macaroni pasta

Instructions

Prep:

Fill the thermos container with hot water and let it sit for 5 minutes.
Meanwhile, heat up the tomato pasta soup, wither leftovers from dinner or making your own with tomato soup + cooked pasta, until piping hot, for about 2 minutes in the microwave.
Pour out the hot water from the thermos, add the hot soup, and close the lid.