Here's a food wrapper you can eat
Here's a food wrapper you can eat The casein film can either be used as wrappers, like this, or it can be sprayed onto food. (USDA) (USDA/AP Photo/Charles Rex Arbogast)
Here's a food wrapper you can eat
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Consider the cheese stick. It is not a beautiful food and it also isn't particularly healthy. It's about as commonplace as snack food gets.
Yet in the packaged version that ends up in so many kids' lunch boxes, each cylinder of mozzarella or cheddar is individually wrapped, like a high-end truffle. And, every day, thousands of those little pieces of plastic wrap are thrown in the trash.
But that may not be the case for long.
Two researchers at the U.S. Department of Agriculture (USDA) have developed a film made from a milk protein that can be eaten with the cheese. Which means that it may not be too long before we have a wrapper we can eat, one that's also healthy. Edible plastic exists, but it's largely made of starch, not protein.

"The benefit," says Peggy Tomasula, one of the lead researchers, "is that it can be consumed with the food so it gets rid of one layer of packaging, like with individually wrapped cheese sticks. It also gives you the opportunity to add vitamins or minerals or ways to block light damage to the food. And, you can add flavors. If you wanted to add a strawberry flavor to something, you can embed that in the film."
The key component in the innovative packaging is casein, a group of milk proteins with high nutritional value. Tomasula has been researching casein since 2000, and actually created a new version of the protein using carbon dioxide. She noticed that it wasn't very soluble in water, and that made her believe it might be used to make a film coating that could extend the shelf life of dairy foods.
Tomasula kept exploring the potential of this research and when another scientist, Laetitia Bonnaillie, joined the USDA team, Tomasula asked her to see if dry milk could be used to produce the film. That would also allow them to make use of surplus milk powder during times when dairy farms are producing too much milk. Bonnaillie also focused on refining the product by making it less sensitive to moisture and improving the process by which the film was made so it could be more uniform and commercial.
At the annual meeting of the American Chemical Society, they announced the results of their efforts. It is edible, biodegradable packaging. The casein film could either come in sheets, not unlike plastic wrap, or be sprayed on as a coating. And, it's been found to be significantly more effective at blocking oxygen than ordinary plastic wrap, so it can protect food from spoiling for a much longer period of time.
There would be some limitations, at least initially.
"This would mostly be for dairy products or foods that would likely be used with dairy, like cereal," says Tomasula. "We wouldn't put this on fruits and vegetables in a market. You couldn't do that because of milk allergies. There would have to be labeling to let people know it's milk protein."
Also, this wouldn't mean that all packaging would be eliminated for cheese and other dairy products. They would still need to be covered in some way, in a box or packet to keep the food from getting dirty or exposed to too much moisture, but dispensing with the individual wrapping around each food item could mean a lot less plastic would end up in landfills. By some estimates, it can take as long as 1,000 years for plastic to degrade. And, unfortunately, less than a third of the plastic Americans throw away actually gets recycled. 
The idea, said Bonnaillie, is to create different versions of the casein film. One might be very soluble, making it better suited for a product you dissolve in water. Another could be considerably less soluble so it would be more resistant to moisture and work better as protective packaging.
"We are trying things with the extremes," she says. "We've just started exploring applications. There are many more things we can do."
Say so long to sugar?
For instance, instead of tearing open a paper container to make instant coffee or soup, you could just drop a casein packet of the ingredients into water where everything would dissolve. Plus, extra protein would be added.
But food companies might actually prefer a spray version of the product. "That way they could store a mixture of the particular milk proteins in water, and then make the coatings and spray them on when they're processing the food," says Tomasula.
One possibility would be to spray the protein film on cereal, which generally is coated with sugar to keep it crunchy.
"It could be fat-free, a healthier way to replace a process that's now largely done with sugar," says Bonnaillie.
Tomasula adds: "We're hoping that for something like meal replacement bars we can make the edible wrapping taste like chocolate. We could combine the ingredients together and provide a little more nutrition."
Tomasula and Bonnaillie say they've already been working with some companies, and believe their edible packaging could be on the market within three years.
Another good sign: Since their August announcement, they've been contacted by what they describe as "two major companies."

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Why isn't this a “perfect” solution?
Write your answers in the comments section below

  • trentmclemore1-dia
    9/21/2016 - 11:43 a.m.

    because you never know who touch what your are eating if the wrapper is edible it can be contaminated

  • austinlarson-dia
    9/21/2016 - 11:52 a.m.

    this isn't a perfect solution because, its not that hard to just take off the wrapper. Another reason is that how is it supposed to stay clean, like when people touch it.

  • taylorstanton-dia
    9/21/2016 - 11:53 a.m.

    this is a good soloution because you can just eat the whole thing package and all

  • taylorcoggins-dia
    9/21/2016 - 11:55 a.m.

    more people could get sick because there touching it and eating it.

  • johannaw-cel
    9/22/2016 - 09:34 a.m.

    Plastic needs about 1,000 years to degrade. And less than a third of the plastic Americans throw away gets recycled. This is a big probkem, because plastic is very harmful for the environment.
    So in my opinion these invention would be very useful, to reduce our plastic pollution. It's also really fascinating that you are able to eat the food wraper.
    Even when you have to use some plastic to wrap the food, and you can't wrap all the food with this wrapper, it is a very good and important progress in protecting the environment.

  • jacklynt-ste
    9/22/2016 - 01:31 p.m.

    Two scientist found a way to make wrappers for cheese so that plastic does not get wasted. I think this is disgusting, I hate cheese and making edible wrappers is even more disgusting. How sanitary are these edible wrappers going to be, will they have to actually have them plastic wrapped to sell?

  • kaileew-ste
    9/22/2016 - 10:31 p.m.

    Scientist have crated a cheese stick wrapper that is made with milk product and therefore can be eaten. However, this doesn't mean that all wrappers will be abolished. The idea is to create different versions of the wrapper, not get rid of it completely and replace it with edible ones.

  • Samantha-E2
    9/25/2016 - 07:31 p.m.

    It is a little disgusting that they decided to make "edible" wrappers for food because if people kept touching it with nasty germs on their hands, and you ate it, you might get sick. The casing was made with milk proteins and you could embed a flavor, like chocolate-mint into the casing.

  • irisp-ste
    9/26/2016 - 09:21 a.m.

    The edible packaging would be hard to keep fresh throughout the day unless you have the entire case of cheese sticks with you and kept cold, so it would not benefit those on the go. Keeping the casein clean would also be a challenge, since you are going to be eating the milk protein film you don't want to have it sitting out where germs can contaminate it.

  • piersonw-cel
    9/26/2016 - 10:34 a.m.

    It may not be too long before we have wrappers that we can eat, and are also healthy. We have edible plastic, but it's largely made of starch, not protein. The American Chemical Society says it edible, non-degradable packaging. The film would either come in sheets or able to be sprayed on as a coating.

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