Seasoned Advice Asked on October 2, 2021
I like to eat off silicone containers. I’ve noticed that if I rinse them right away after eating, there will be basically no visible residue left on the surface.
Now let’s say that, err, I had a friend who is lazy and gross and was considering rinsing a container that way and placing it in the fridge in between meals, eating in that same container throughout the day and only washing it properly after dinner.
That would be yucky, yes, but not dangerous, right? Since the fridge can keep a whole container of food safe for a few days, surely it can keep some microscopic food residue safe from morning until night? The food would only stay briefly in the temperature danger zone (4-60 C or 40-140 F) when eating, so it wouldn’t add up to two hours of non-safe temp throughout the day.
I coul-I mean, my friend could even rinse with hot water, or place it in the freezer instead to make extra sure. Or you know, actually wash it for real, but it’s a really lazy person I’m talking about here.
EDIT – To summarize: I want to know whether it is dangerous to not fully clean the container in between meals throughout a day (like three or four times). I would only give it a quick rinse to remove visible residue, and then keep it under 4 C / 40 F, where bacteria won’t grow too quickly (and then clean it properly afterward for the next day).
I see you're familiar with the "danger zone" concept. I think the only on-topic way to answer this is to help you add up the "danger zone" time, (and raise the concern of cross contamination!). I will say in response to your heading, there is no "loophole" in food safety guidelines. They are pretty stark in that things are either safe or not.
Eating something that has been treated "unsafe" aren't guaranteed to make you ill--but for this site, "will it make me sick?" is off-topic, while "is this considered food safe?" is on-topic, so I'll focus solely on the latter.
It's not guaranteed this will happen, but every time you handle something, you risk cross contamination. Uncovered food in the fridge can also be a contamination vector. Each time you reuse a dish without washing, you essentially double your chances of having a problem. A trace of e. coli on an apple peel during breakfast has a chance to be transfer to the plate, grow all day long and be ingested during every meal of the day, increasing the chances that you might get ill.
Keep in mind that this is a CUMULATIVE time for the food (and residue)--it doesn't reset when the food hits your bowl. Also, food safety guidelines consider a plate to be "contaminated" with food from the time food hits it until the plate is properly washed/sanitized (ie, with soap). Even if there is no visible residue, if it hasn't been washed properly the plate is treated the same as if there was still a full serving of food on it, from a food safety perspective.
Based on all of that, you'd need to add up time the ingredients (for everything that was on the plate) are unrefrigerated coming home from the grocery, being prepared & cooked (between cold and hot), after cooking on your plate, time in the fridge while cooling back down, repeat for each meal.
If you use the same plate for breakfast, lunch, dinner, and dessert without washing, you'd essentially be calculating the danger zone time as if you had breakfast leftovers that you refrigerated then reheated at lunch. Then added extra lunch leftovers and put them in the fridge. Then you reheated breakfast and lunch leftovers, added some dinner leftovers and back into the fridge. Then reheated breakfast, lunch, and dinner leftovers to eat them for dessert.
So it gets complicated to do all that math... But there's a lot of time that will accumulate as it passes from warm to cold to warm to cold, etc.
It seems unlikely that you'd be able to add up all that time in the danger zone and still stay within the time window that is considered food safe by government food safety guidelines.
If you're already going to rinse it water to remove visible residue, a quick swipe of a soapy wash cloth seems like a low-difficulty added effort to wash away the remaining unseen food & bacterial residue. I'd even possibly argue that a quick soapy wash is no more difficult than trying to find a way to stay within food safety guidelines.
Correct answer by AMtwo on October 2, 2021
As you are asking about a single day, I'm pretty sure it's safe.
Lets compare the concept with how we handle our typical leftovers;
Say we made chilly, and stored it in a container in our fridge, so every time we decide make tacos, simply could scoop out some chilly. 2 days after we made the chilly, it came down to the last scoop. Would we hesitate to scrape the bits of residue from the edges of the contain? I wouldn't.
Of course, this is assuming that nothing dirty made contact with the container while you were using it.
Answered by Anastasia Zendaya on October 2, 2021
I don't think that this plan is necessarily unsafe, in terms of likelihood of sickening or killing you, but it's definitely less safe than washing the container.
It only requires a microscopic amount of pathogens to make you extremely sick; that there is no visible residue is not as strong an argument as you seem to think. Rinsing is better with soap, too. for most consumer-grade soaps it's surfactant action that gets rid of pathogens-- they're not as good at clinging to surfaces when there is soap in the mix.
We're also talking about probabilities that add up over time-- you will be rolling the dice every meal, every day, with worse odds of success without washing. Your absolute risk of becoming ill as a result of doing this might not be very high, but your relative risk (compared to washing your dishes, or using clean ones) will be higher.
To illustrate, let's consider:
There are about 265,000 illnesses from E. coli in the United States each year. If the US population is 328,000,000, and the incidence of E. coli infections is evenly distributed among the population (it isn't, but let's keep things simpler), that is an annual illness rate per person of ~0.0008, or 0.08%. We'll also pretend that E. coli is the only foodborne illness risk there is.
That's around one illness per 1,250 people per year, which isn't too bad. Let's imagine that your plan doubles the relative risk (that's a huge jump and I have no data about how this practice might affect your risk, but should still illustrate the ideas). That would mean a 0.16% illness rate among people that eat that way.
That's still pretty low, in absolute terms! Most people certainly do riskier things every day. And yet it would still be enough to cause an extra 265,000 E. coli illnesses per year (if everyone made the switch), for a total of 530,000. That's a lot of extra illness.
But the point is that, while the absolute risk is still pretty low (0.16%), the relative risk is twice as severe, and the excess risk is (in this toy example) 100% avoidable with little effort.
Saying that it's safe is a pretty fuzzily defined conclusion-- your risk is never going to be zero, and is zero risk even the standard to use? Saying that it's safe enough for your risk tolerance and cleaning preferences is more defined but subjective; no one else can tell you if it's safe enough for your preferences. It is all but guaranteed to be less safe than washing the container.
Answered by Upper_Case on October 2, 2021
I'd add that it depends a lot on the food. On one end you have food that's inherently on the safe side, like sour milk products: They can safely stay at room temperature for a day or longer — being kept warm is how they are actually produced. The more acidic, sweet or salty a dish is, the safer.
On the unsafe end would be proteins like raw egg (in mayo) or raw, minced meat or fish which are bacteria breeding grounds.
Answered by Peter - Reinstate Monica on October 2, 2021
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