Omar Khalid
Plastic airtight containers are a great way to store food and keep it fresh. However, they can sometimes be tricky to open, especially if they have been vacuum sealed. If you're struggling to open a plastic airtight container, there are a few things you can try. One method is to reheat the contents of the container to expand the air inside. This can be done by boiling water in a pot, letting it cool slightly, and then inverting the container so that just the lid is submerged in the hot water. You can also try using a butter knife or a dull instrument to carefully pry the lid open. If you're looking to improve the suction on your plastic containers, you can try cleaning the surface with hot water and dish soap, rubbing alcohol, or using petroleum jelly to create an ultra-tight seal.
How to fix suction on plastic airtight containers
| Characteristics | Values |
|---|---|
| Cause of suction | Heating and then cooling the container with the lid on |
| Solution 1 | Reheat the contents of the container to expand the air inside |
| Solution 2 | Dip the bottom of the container in hot water and the top in cold water |
| Solution 3 | Pry the lid off with a knife or a similar tool |
| Solution 4 | Leave the container out at room temperature for 1-2 weeks |
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What You'll Learn
Reheat the container to expand its contents
If your airtight container is stuck, it's likely because the contents expanded when heated and then contracted as they cooled, creating a vacuum seal. To fix this, you can reheat the container to expand its contents and break the seal.
First, find a pot with a diameter larger than your container's lid. Fill the pot with water and place it on the stove to boil. Once the water has boiled, let it cool down until it is no longer steaming. It is crucial to wait until the water stops steaming to prevent steam burns when holding the container over the water. If you're still concerned about the hot air, you can wear an oven mitt for protection.
Next, invert your container and submerge only the lid in the hot water. You should feel the pressure release and the seal break. This process may take a couple of minutes, so be patient and careful not to burn yourself.
If you're worried about burning your hands from the steam, an alternative method is to place the entire heated container on a dish towel. Use your fingers or the towel to pry the lid off gently. If the seal has released, it should come off relatively easily. If it's still challenging to open, repeat the previous step of heating the lid in the water bath.
If you don't mind the contents spoiling, you can leave the container at room temperature for one to two weeks. During this time, the food will spoil, and the air inside will expand due to bacterial growth. After this period, the seal will break, and the lid will come off easily. However, it is not recommended to consume the food at this point as it has likely spoiled and may be unsafe to eat.
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Use a dull instrument to pry the lid
If your plastic airtight container is stuck, one way to fix it is by using a dull instrument to pry the lid. This method is particularly useful if you have heated the container with the lid on, creating a vacuum seal.
Firstly, find a dull instrument to use. A butter knife is a good option, as suggested by some users. You could also try a fork, or another flat, dull instrument. Next, carefully slide the dull edge of your chosen instrument under the lid of the container, by the rubber gasket. You may need to do this in 2-3 different places. Once in place, slowly and carefully apply a lever action to release the pressure. This should help to pry the lid off.
Be cautious when using this method, as hot steam may be released when the seal is broken. It is recommended to wear an oven mitt or use a dish towel to protect your hands when attempting to remove the lid.
If you are unable to pry the lid off using a dull instrument, there are other methods you can try. One suggestion is to reheat the contents of the container, causing them to expand and release the pressure. You can do this by boiling water in a pot and then allowing it to cool slightly. Place the container upside down in the pot, ensuring only the lid is submerged. After a couple of minutes, the pressure should be released, and you can try to pry the lid off with your fingers or a dish towel.
Alternatively, you can leave the container at room temperature for one to two weeks. During this time, the food inside will spoil, and the air inside the container will expand, eventually breaking the seal. However, please note that this method will result in the contents of your container being spoiled and should only be used if you do not need to consume the contents.
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Dip the container in hot water
If your plastic airtight container is stuck due to a vacuum seal, you can try dipping it in hot water to fix the suction issue. This method is particularly useful if you have heated the container with the lid on and then let it cool down, causing the contents to contract and the lid to get stuck.
First, boil a pot of water on the stove. The pot should be larger than the diameter of your container's lid. Once the water has boiled, let it cool down a little. It is important to wait until the water is no longer steaming to avoid getting a steam burn when holding the container over the water. If you are still concerned about the hot air rising from the water, you can wear an oven mitt to protect your hands.
Now, invert your container and dip it far enough into the hot water so that just the lid is submerged. You should feel the pressure release and the seal break. This process can take about two minutes, and you can take breaks or switch hands if your container is heavy. You just need to ensure that the contents of the container are heated sufficiently.
If the seal does not release easily, you can try heating the lid in the water bath again. Alternatively, you can place the heated container on a dish towel to absorb any splatters and then use your fingers or the towel to pry the lid off gently.
If you do not mind the contents of your container spoiling, you can leave the container out at room temperature for one to two weeks. Over time, the air inside the container will expand as bacteria grow, eventually breaking the seal.
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Boil the suction cups
Boiling suction cups is a great way to get them to stick better, especially if they are older and have lost some of their stickiness. The heat from the boiling water will soften the plastic, making it easier for the suction cup to adhere to the surface of your choice.
To begin, take a small pot and fill it with enough water to completely submerge the suction cups. Bring this water to a boil. Once the water is boiling, you can turn off the heat source and carefully place the suction cups into the hot water. Be sure to use a pair of tongs or heat-resistant gloves to protect your hands from the hot water. You don't want to leave the suction cups in the boiling water for too long—around 30 seconds should be enough time to soften them.
After 30 seconds, remove the suction cups from the hot water and place them on a lint-free cloth to dry. It is important to ensure that the suction cups are completely dry before attempting to stick them to any surface. Once they are dry, you can press them firmly onto your desired surface, making sure there are no air pockets underneath, as these will weaken the seal.
If you find that your boiled suction cups are still not sticking as well as you would like, you can try adding a thin layer of petroleum jelly to the suction surface. This will help create an even tighter seal by filling in any small gaps or air bubbles between the suction cup and the surface.
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Use petroleum jelly on the suction surface
If your airtight plastic containers are not staying shut, you can use petroleum jelly to fix the suction. This is a simple and inexpensive solution that can be applied in a few easy steps.
First, ensure the surface of the container is clean and dry. Next, grab a paper towel or a dry rag, and dab a small amount of petroleum jelly onto it. You can also use your fingertip, but be sure to only use a small amount of jelly—enough to form a thin layer. Too much jelly will make the surface slippery, and the container will not stay shut. Rub the jelly onto the rim of the container, or the inside of the lid, depending on the design. Press the container shut to dispense any trapped air and maximise the seal adhesion.
This method works because the petroleum jelly fills in any gaps and creates an airtight seal. It is important to note that this method works best on hard, flat surfaces. Suction cups are more likely to fall off if the surface has any curves or textures, as this can let air into the cup and break the seal.
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Frequently asked questions
If your plastic airtight container is stuck due to suction, try reheating the contents of the container to get them to expand again. Place a pot of water on the stove and bring it to a boil. Allow the water to cool slightly, then dip the container so that just the lid is submerged. The pressure should release when the seal is broken.
You can try using a dull instrument, such as a butter knife, to slowly and carefully apply a lever action to release the pressure.
Yes, you can try to create an air gap by pouring cold water into one container and dunking the bottom of the other container in hot water.
To prevent suction, ensure that you do not heat the container with the lid on. You can also try to avoid letting hot food cool down with the lid on, as this can create a vacuum seal.
To get suction cups to stick better, start by cleaning the surface thoroughly with hot water and dish soap or a household cleaner. Then, rub the spot with rubbing alcohol to remove any remaining dust or debris. Finally, try adding petroleum jelly to the suction surface to fill in any gaps and create an ultra-tight seal.
