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Tupperware is a massive brand in the kitchen industry. In fact, it almost becomes synonymous with food containers at my house. It’s a brand that many people trusted and used every day. But how good are they when it comes to storing your food? Is Tupperware airtight? Here’s what I found.
Tupperware brand containers are airtight. Their lids fit perfectly and tightly, preventing air from getting in or out. In fact, airtight and waterproof lid were the initial features of this food container brand created by Earl Tupper, the genius American chemist that invent Tupperware.
Tupperware also boasts of other benefits, allowing it to become not just a simple pioneer in the innovative food storage industry, but also grown into a world-class and trusted brand.
- Is Tupperware an airtight container? What is an airtight container and how does it work?
- Best Tupperware airtight containers
- Tips for Tupperware airtight containers care and usage
- Airtight containers alternative
Is Tupperware an airtight container? What is an airtight container and how does it work?
Tupperware airtight containers have an airtight lid that sealed tightly on every container, preventing air from entering into and going out of the containers.
But why do you need to block the air anyway? Isn’t air essential?
Well, for most cases, the air is indeed critical. But when it comes to storing and preserving certain foods, air can cause more harm than good.
Oxygen in the air is the key element that triggers the oxidation process, which causes chemical changes in the properties of your stored foods. 
This chemical process produces unpleasant changes in your food’s flavor, color, and nutrient content. 
So when fats in your food become rancid, it’s actually the result of oxidation.
Due to the adverse effects of air on your food, airtight containers are created to shield your foods against this damaging molecule.
Airtight containers come with airtight seals that help protect your foods from external oxygen that can ruin the quality of your foods, makes them rancid, and degrade their nutrients. 
Nevertheless, they can only protect your food from spoilage to a certain extent. They don’t have any preservative effect on your foods.
Also, you have to keep in mind that not all food can be stored in an airtight container.
Dry foods are especially best stored in an airtight container to prevent them from absorbing moisture and become clumpy. You should also store your biscuits and crackers in these types of containers to preserve their crispness. 
Cooking tips: You can restore the crispness of your crackers by heating them on a cookie sheet in an oven for a few minutes at 425℉.
Here are other food items that you need to store in airtight containers, according to food and health authorities. [05,06]
White and specialty flour
Whole wheat flour
Airtight containers, refrigerated, or freeze
Non-fat, dry, unopened milk
Spaghetti, macaroni, and egg noodles (opened)
Brown and granulated sugars
Tea bags, instant, and loose tea
Hot roll mix (if opened)
Airtight containers or package
Instant mix potatoes
Airtight containers or package
Airtight containers (if possible, refrigerate them)
Airtight containers; keep cool
Herbs and spices
Airtight containers; in dry places away from heat and sunlight
Dried beans and peas
Popcorn (including microwave popcorn)
Best Tupperware airtight containers
Apart from being airtight with innovative design, Tupperware food storage containers are stackable, reusable, and durable.
Each Tupperware product is made of materials that are safe, non-toxic, non-carcinogenic, and eco-friendly. So you don’t need to worry about contaminating your food with harmful chemicals.
Some Tupperware products are also microwave-safe, and others even come with vented lids to let some air escape while keeping most of it inside the container, so your food stays moist.
Here are the best picks for Tupperware airtight containers.
Tupperware Modular Mates
Tupperware modular mates come in different sizes and shapes, from rounds to ovals to squares, to fit any food and cabinet sizes.
They are airtight, spill-proof, and are modularized to stack neatly and orderly to save space in your pantry.
They have a see-through panel on the front, so you can see exactly how much of your food is left inside without having to open them each time.
I have the modular mates oval set at home and use them to store dry products like powdered milk and coffee. I especially love its stackable design and durability.
Tupperware Fridge and Freezer Set
Tupperware Fridgesmart 4 pcs container set is great for keeping fruits and vegetables in your fridge.
They feature an innovative venting system that allows you to control airflow and moisture to keep your fruits and veggies fresh much longer, regardless of the season.
It comes with an easy-to-follow printed produce chart that instructs you how to adjust the airflow, depending on your produce.
It has a rectangular design and comes with two small-deep containers (1.8L), one medium container (1.8L), and one medium-deep container (4.4L).
Tupperware Freezer Mate container is designed to keep the freshness of your frozen food.
The containers are made of materials that can withstand cold temperatures as low as -20℃
Each container features a clear window, so you can easily and quickly identify the food inside. The rounded corners and recessed bottoms enable air to circulate throughout the containers for rapid freezing.
When storing your food inside the Freezer Mate container, be sure not to exceed the fill line to ensure enough room for expansion when the food freezes.
Tupperware One-touch Reminder Canister
This Tupperware chic canister set comes with a unique viewing window that reminds you of the contents, so you don’t have to open the lids to identify the food.
The clever window also enables you to know if the contents are running low.
Similar to the original airtight Tupperware containers, these durable canisters can preserve the flavor, texture, and freshness of your food.
This dishwasher-safe canister set comes with one junior canister (1L), one small canister (1.9L), one medium canister (2.8L), and one large canister (4L).
Tupperware Smidget Container
If you’re looking for a tiny version of airtight and watertight Tupperware to store small food items or food portions, this Smidget container set is for you.
Since they are small, you can easily stack them, store them, and bring them with you. Each container can store up to 30 ml or 1 ounce worth of food.
You can use them to store a small number of pills, supplements, pickles, jam, nuts, dressings, and ketchup that you can carry easily during travel.
Tupperware Wonderlier Bowl Set
They can accommodate all your cooking and baking needs. You can use them to store, prep, serve, and transport your food.
When not in use, you can easily arrange them into a nest for compact storage.
The Wonderlier Bowl set comes with one 6-cup capacity bowl, one 8-cup capacity bowl, and one 12-cup capacity bowl, all of which have liquid-tight seals.
Tips for Tupperware airtight containers care and usage
To prolong the shelf-life of your Tupperware airtight containers, you should care for and use them properly. The following are some helpful guidelines on how to properly store, use, and take care of your Tupperware container. 
Before storing your Tupperware containers on the shelves or in the cabinets, make sure each container is dry. You can use a soft cloth to dry them.
To keep your containers air-fresh, store them without seals.
Before closing the lids or applying the seal of your containers, make sure your hot beverage has cooled down. Hot liquids, including cooking oil or hot foods containing fats like soup, should also be allowed to cool down before putting them inside the Tupperware container.
Tupperware products are not made for cooking, so you should not use them in a microwave oven except those that are designed for microwave use and are microwave-safe, such as the Tupperware Microwave Stack Cooker and Crytalwave reheatable products.
Still, you should never use reheatable Tupperware products on a grill, on the stove, in the conventional oven, or in a convection microwave oven with conventional settings.
Avoid reheating some foods, particularly those with a high amount of sugar or fat, since these foods can become super hot and damage the containers.
Reheating chili-based or tomato-based sauces and foods may result in staining due to the natural food colorants present in various vegetables.
Care and cleaning tips
The ideal product to get rid of stain and stickiness on your Tupperware containers is the baking soda paste.
To prevent cuts and scratches, stay away from strong undiluted detergents and abrasive cleaners. Instead, use a mild detergent and a soft sponge. Also, avoid using sharp utensils.
Wash your Tupperware containers with warm water to get rid of the oily substance.
To remove unpleasant odors on your containers, you can try the following tricks:
- Stuff them with newspaper
- Seal a piece of charcoal
- Clean both containers and lids with baking soda paste
- Coat the container’s inside surface with a mixture of water and lemon juice then rinse
- Clean the container with a mixture of water and vinegar
- When not in use, leave the container open
Airtight containers alternative
If you have a small budget and wish to purchase a more affordable alternative to Tupperware airtight containers, you can try the following items:
- Vacuum seal rolls: Vacuum sealer bags or rolls help preserve your foods’ freshness for weeks by creating an airtight barrier around your foods. They come with customizable length, allowing you to cut the roll to whatever length you want to store any size of foods.
- Ziploc Gip ‘n Seal: Ziploc storage bags come with a triple sealing system, which includes an extended tab, new and easy-to-grip texture, and an airtight double zipper. Each pack contains 120 BPA-free storage bags that are microwave-safe. They are also ideal for storing food in the fridge.
- Mason jars: Mason jars have an airtight seal. Although they are normally used for pickling, canning, and fermenting fruits and vegetables, you can also use them to preserve and store foods. Their crystal clear glass allows you to see the contents easily.
- Tupperware is a top-quality airtight container that has successfully passed stringent tests. They are built to last with innovative and smooth design and finishing.
- Popular and best Tupperware containers include the Modular Mades, FridgeSmart, Freeze Mate, One-touch Reminder Canister, Wondelier Bowls, and Smidget containers.
- To extend your Tupperware airtight containers’ shelf-life, be sure to use, store, and care for them appropriately.
- Cheaper alternatives to Tupperware airtight containers are the vacuum sealer bags, Ziploc Gip ‘n Seal, and Mason Jars.