Until recently, a large number of metal bottles and food containers that were made of steel that also incorporated a protective coating of galvanized steel for protection against rust, corrosion and weakening of the metal.
This coating consists of a protective zinc layer surrounding a thicker metal which in most cases is steel or iron. The majority of manufactures have moved away from using galvanized steel for making beverage containers due to the USDA deeming the material as unsafe to serve food and drinks in because there is a risk that a substantial amount of the zinc coating could dissolve into the beverage depending on its acidity.
Figure 4: Standard plastic thermos design with vacuum sealed interior walls designed to keep beverages warmer or colder. Materials that have either a high or a low thermal conductivity can be a good choice for keeping your beverage cool depending on the situation at hand.
Metal cans will cool down substantially faster when placed in a refrigerator due to the rapid transfer of hot and cold air that is occurring between the warmer metal can and the cool surrounding air in the fridge.
On the other hand, when a metal can is placed in direct sunlight; it will begin to heat up extremely fast compared to a plastic bottle that restricts the energy transfer from the hot air to the liquid.
These difference in the materials response to a change in temperature can be analyzed by comparing the thermal conductivity of plastic vs metal materials.
Reusable beverage containers such as a thermos can harness the thermal properties of both metal and plastic and are the most effective temperature regulators for keeping a drink hot or cold for longer.
Andy Northrop, M. Deziel, C. How Does a Thermos Work? What is the Best Water Bottle Type? Latest Trending Press Release. October 29, Effective Winter Jacket Insulation October 8, What is Coefficient of Thermal Expansion? None of you guys get it!
Its based on the transfer of Thermal energy and light energy if its in the sun or if its in your warm hand its based on the transfer of thermal energy. Aluminium cans are big heat transfers than plastic, for example when you are cooking a turkey it takes a long time to cook there is a cooking tip to cover the turkey in aluminum foil to speed up heating so, aluminium cans DO NOT keep your drink colder longer. Metal is a natural conductor of hot and cold conditions.
So, if a can gets taken out of the refrigerater at the same time as a bottle, as long as we are talking about a glass bottle, then the can is going to increase in temperature faster, thus the glass bottle would stay colder. If you are talking about a plastic bottle, then the can would stay colder longer because plastic does not hold any temperature very long.
Plastic is quickest to convert into the temperature of its surroundings. I find that aluminum cans keep soft drinks cooler longer than plastic bottles. The popular Pittsburgh Brewery Iron City Beer released an aluminum beer bottle to replace the typical glass beer bottle. In the promotion of the aluminum bottle, the Pittsburg Brewery claims that beer in their aluminum bottle will remain cooler for?
Good article but I take exception with the comment that Oscar Blues started the canning trend. Upslope, just up the road from Oscar Blue started canning a few years earlier for just the reasons you state. Hey Dan, thanks for the comment. Not that it really matters who started it all…. And even more privileged to be part of the whole micro-brew uprising.
BPA in our food system is getting more and more attention lately and for good reason. And I have to say slightly jealous of the scene you get to be a part of up there in Oregon. I like my tap water beer. Generally, if you like your water, the beer will be alright.
Being an engineer I would like to know, are you saying glass breathes or the bottle Crown bottle cap leaks. Since beer is carbonated, if the bottle is under pressure how does oxygen get in? We need to know more about how oxygen gets in. The real question is how does the beer taste.
What about the pros and cons of bottles? I liked the article. Would have liked more about bottles too. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Toggle navigation Learn Call Call
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