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I have a coffee maker in my office, but no fridge for my cream! Unfortunately, even a mini/bar fridge would be too big for my office.

What other options do I have for keeping cream good for 8-10 hours? I can bring just what I'll use for the day in the morning. The room is kept at 20-22C all day. How long can cream be stored at room temperature before it is risky to use?

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    Welcome to Coffee! I think this is a fine, on-topic question... just for completeness, also consider Seasoned Advice for more general preparation and storage concerns (or if you don't get the answer you're looking for here). – hoc_age Jun 26 '15 at 3:10
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Companies (including Nestle) make creamers that do not require refrigeration. They are likely available in your local grocer, you just need to check the label and make sure refrigeration isn't required.

If you are paranoid about potential bacterial growth or contamination (like me) you may check into bulk buying the single serving creamers that they use at restaurants. They require no refrigeration either and are sealed until use.

If you are looking to keep "real cream" cold for 8 to 10 hours, you may want to look into some sort of freezable lunch bag or small ice chest that will stay cold and takes up less space than a mini-fridge. This would require substantially more effort, but may be worth it if you are particular about your cream. Also from the comments below, you may look into a double wall vacuum thermos. They are increasingly popular and come in a wide variety of qualities and prices, so do your research before buying.

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  • Traditional lunch box would probably do the trick. +1 – Dan Beaulieu Jun 25 '15 at 23:53
  • ... or a freeze-able container such as the bowl for an ice cream maker, or like you might find in a hotel mini-bar. Perhaps also consider a double-wall vacuum flask. +1 for highest likelihood of being able to consume safe, actual milk. – hoc_age Jun 26 '15 at 3:20
  • All of the coffee mate and similar liquid bottles I have seen in Canada say they require refridgeration. Maybe they are different in other countries? Or I just havent found the right ones yet. – Grant Jun 26 '15 at 3:36
  • It's possible Canada has some regulation against such things, but perhaps more likely you just haven't found it yet. I know here in Canada's neighbor the refrigeration required creamers are usually kept in a cold case with the dairy. The non-refrigerated varieties are usually in the coffee isle next to the prepak coffee and bean dispensers. Also I'll add the vacuum flask idea. – Suspended User Jun 26 '15 at 18:04
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There are some really small coolers that go for about $20, powered by USB. This means you can use pretty much any standard USB wall charger capable of delivering 2.5 watts to power one. It'll hold a 12 ounce jug of milk and keep it cold.

Stats says it goes down to 46°F. While technically milk should be stored below 40°F for absolute safety and quality, most insulated lunch boxes with a 'freeze pack' get a bit warmer than that after a few hours.

Frankly, you run a small risk using anything but a refrigerator. I don't think you'd run into a problem, but the only totally 'safe' bet in your case is creamer that doesn't require cold storage.

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  • I had looked at these...but they all seem to use a peltier cooler that probably relies on a metal can do distribute the cold. Not sure they would work for a cardboard cream container. – Grant Jun 28 '15 at 14:18
  • @Grant I was thinking something like a small steel pitcher for it, filled in the morning. – Tim Post Jun 28 '15 at 15:56
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    +1 because USB FRIDGE?!? Love this idea. I bring my own soda to work. The fridge has a lot of soda that is open to anyone and I don't want anyone taking my Dr. Pepper. So I may snag one of these. – NealC Jun 29 '15 at 16:59
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It sounds like both you (and @Chris) are talking about liquid cream or creamers that resemble liquid milk in some way. If you're willing to stray from that...

Though I wouldn't eat them myself, consider also powdered creamers. These can be based on dried milk (which is very nearly still food), or on non-dairy stuff (partially hydrogenated oils, etc., which I don't know what they are).

As for the safety aspect of your question, you have basically zero time at room temperature for milk to be truly safe. According to this page, bacteria starts growing at about 45°F / 7°C; it'll get there pretty quickly if not cooled. Practically speaking, you have some time but it is not hours. I thought I had seen a chart of time-at-temperature (e.g., safe for 1 hour at temperature X, 30 minutes at temperature Y, etc.) but I can't find anything like it now.

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Maybe a bowl with ice in it, perhaps an insulated bowl or container that is big enough to hold the creamer container and sufficient ice to keep it cold. I worked at a temporary office for an insurance co. and that's how they kept it cold. The small cooler is a pretty good idea also.

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Some options.

Have you tried freezing the cream, then using it as it melts? This works for bottles of milk, but I have never done it with cream.

Fill an unglazed clay pot with cold water, putting in cream in a sealed container in the pot, was the water enverperates from the damp sides of the pot, it cools the pot. To speed up the process put the pot in front of your desk fun.

A sealed container in the flush tank of a well used WC may work, if the cold mains water is cool enough, when camping a river is used in that way.

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