FoodSaver 4840 2 in 1 Automatic Vacuum Sealing System Review

Even though I live by myself, I still make a lot of food. I’ve been strength training for a while now, and when I need to bulk up,

I make a ton of food at once and just eat it for the whole week. Before, I would usually have to cook twice a week, since the meals just wouldn’t last too long in the refrigerator.

However, once I found out about vacuum sealing my food, I tried it out. Suffice to say, I will not be going back to the old way.

Today, I’ll be talking to you about my favorite vacuum sealer, the FoodSaver 4840 2 in 1 Automatic Vacuum Sealing System.

I’ve tried multiple sealers so far, but the 4840 is my favorite of all. I’ll be showing you how this machine works, and why vacuum sealing is the best way to go when you want to save time, money, and your food.

What is Vacuum Sealing

We all know that, over time, food spoils. While certain foods may last longer than others, the simple fact remains that oxygen is the worst thing for food preservation, as it is what breaks down the molecules and causes spoilage.

Thus, to eliminate the problem of food going to waste, the answer is vacuum sealing. This process is simply removing all of the air from a container via a vacuum, so it is both airtight and oxygen-free.

The tighter the seal and the less oxygen contained within, the longer your food will last.

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Factors That Keep In Mind

Benefits of Vacuum Sealing Food

I love to vacuum seal because I hate cooking. Thus, I just try to make as much food as I can at once, so I don’t have to cook every day.

Plus, with my busy schedule, food preparation is just something that I don’t have time for. That being said, here are the top reasons you should be vacuum sealing your food.

Save Money: food waste is a huge problem in the US, with almost forty percent of our food going to waste.

If you want to get the most out of your grocery bill, vacuum sealing means you’ll be throwing away less and reducing the amount of time spent replacing wasted food.

Save Time: as I mentioned, I try to cook as little as possible. If you’re like me, then you can devote one day to cooking and seal the food for the whole week without risking it going bad.

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Meal planning is becoming much more popular these days because of the convenience and health benefits, so if you’re interested in starting it, vacuum sealing is the way to go.

Eco-Friendly: the more food we waste, the more energy, time, and resources are wasted in making it.

With environmental issues becoming more prevalent in our lives, it’s important to do our part to help reduce waste and become more sustainable. Vacuum sealing is a small step towards that goal.

Prevent Stale Foods: most people assume that you would only vacuum seal things that go into the freezer or refrigerator.

However, sealing dry foods like pasta, nuts, and chips can be much more beneficial than leaving them sitting out. If you want to keep your snack foods from going stale, vacuum sealing is the best way to keep them fresh.

Tips for Better Vacuum Sealing

Although vacuum sealing is a pretty straightforward process, there are still some things to consider to get the most out of your sealing system. Here are the most common tips to follow to ensure a proper vacuum seal every time.

Don’t seal hot foods: the heat can disrupt the sealing process or worse, prevent the bag from sealing properly.

Also, hot foods will cause bubbles and air pockets to develop, which can adversely affect the shelf life

Don’t seal sharp objects: as the air is removed, the bag compresses against whatever is inside. If you seal sharp objects, then it can tear the bag and cause you to start over

Leave space at the top: no matter what kind of food you use, leave some space at the top to ensure a proper seal.

If there isn’t room at the top, you may not be able to seal the bag properly, which can let air in

Don’t seal liquids: as the machine sucks the air out, it can start to suck liquid out too. Freeze liquids before sealing to make sure this doesn’t happen

Leave extra space for powdered foods: if you seal things like flour, sugar, or anything else that’s powdered or granulated,

then you want to leave even more space at the top, so particles will not get sucked into the machine

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Only use vacuum seal bags: while the device can work on chip bags and Ziploc bags, to get the best vacuum seal possible only use the properly rated bags.

Usually, you can find these on third-party websites to save money, but Ziploc bags will not keep the air out as well as vacuum seal bags

Wait a minute between uses: since the machine heats up to seal the bag, wait about a minute between seals so the device can cool down. Doing this will extend the life of your FoodSaver

Freeze fruits and blanch vegetables: if you plan on canning your fruits and vegetables or sealing them for long-term storage,

You will still need to blanch or freeze them first to ensure that they will stay fresh and edible over time. Vacuum sealing is not a replacement for proper canning techniques

Other Considerations for Vacuum Sealers

When looking at the right vacuum sealer for your kitchen, take these factors into account to ensure that the model you choose has all the right features you need.

Size: if you have limited counter space, don’t get a sealing system that is too large to store effectively. The 4840 is bigger than other models, so make sure you have the space to use it and store it.

Portability: the 4840 is a 2 in 1 sealing system, which means that it comes with a portable sealer as well as a traditional bag sealer. If you want to seal other containers like Ziploc bags or Tupperware, then a portable unit is ideal for that.

Cost: in addition to the expense of the device itself, keep in mind the price of replacement bags as well as any accessories that you may want or need. Bags can be somewhat expensive over time, so make sure that you take that into consideration if you plan on vacuum sealing on a regular basis.


  • Heavy Duty Construction
  • Easy to Use
  • Comes with all necessary equipment, including bags
  • Powerful vacuum is more efficient than other models
  • Variable settings for better sealing
  • Washable and easy to clean
  • Comes with portable sealer for convenience
  • Ideal for all shapes and sizes of containers
  • Perfect for long-term and short-term storage
  • Food lasts much longer than in traditional packaging
  • Automated sealing


  • Larger and bulkier than other models
  • Does not work well on liquids
  • In some instances, the bags may take a while to seal properly
  • Sometimes the portable sealer will not retract into the unit
  • In rare cases, the bag detector may not work
  • Jar sealer may not function properly on some jars
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  • Durable construction
  • Large vacuuming system works much faster than other models
  • Comes with a variety of bags to get you started
  • Portable sealer included for your convenience
  • Settings for moist or dry food for better results
  • Roll storage included
  • Cutter included so you can customize the bag size
  • Drip tray drawer comes standard
  • Drip tray is removable and dishwasher safe
  • Portable sealer works on all kinds of containers
  • Automatic sealing


Can you seal your bag without vacuuming the air out?

Yes, this model comes with a “seal” button that will just close the bag without vacuuming anything out. Simply put the bag in and before it starts sucking press that button.

Are all of the bags and vacuum parts BPA-free?

Yes, according to the manufacturer, everything that touches food is BPA-free.

Can you use any kind of bag with this machine or just the ones it comes with?

If you just want to seal your bag, then you can use anything, from Ziploc to a chip bag. However, if you want to vacuum seal, you’ll need to use bags that are designed for that.

You can usually find vacuum seal bags on third party websites that will work just as well as the FoodSaver bags.

Final Verdict

When it comes to saving food, no one does it like FoodSaver. Although the size of the 4840 model is much bigger than other vacuum sealers I’ve used in the past, I’ve actually come to like it better.

The reason for that is that it comes with bag storage and the portable sealer, so I’m saving space by having it all consolidated rather than storing everything separately.

I love the portable sealer since I sometimes will cook food for future meals, and I like to store them in Tupperware containers. With the portable sealer, I can keep all my pre-planned meals fresher for much longer.

Overall, I’m very satisfied with the FoodSaver 4840 Food Vacuum Sealer, and I use it all the time.

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