Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Replace "light" with "sausages" and this may work...

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Indicator Wrap

 Take the guesswork out of spoiled leftovers
  (+2)
(+2) 		  [vote for,
against]

I had an idea not to long ago that would totally eliminate the guesswork of leftover freshness. Have you ever had to have a taste/smell test for your leftover food to check to see if it was spoiled or not?? Eating spoiled foods can cause food poisoning and other illnesses. this detection can be done By using some sort of chemically coated celiphane wrap (to be placed on leftover food containers as you would use regular celephane) that would change colors when the food was bad (airborne bacteria would react with the chemical). of course, the chemical would have to be food safe and the dye moisture-proof.
—snboardcj, Jun 06 2004

Smart Food Containers http://www.halfbake...20Food_20Containers
redundant, sorry [FarmerJohn, Oct 17 2004]

tell time with rotting prawns http://www.wired.co...ml?tw=wn_tophead_10
this made me think of that. [xclamp, Oct 17 2004]

[link]






       It seems we have similar Ideas, I came up with mine 5 years ago and won a full ride scolarship to college at an invention fair for it. When did you come up with yours?
—snboardcj, Jun 06 2004
   

       Six. Unfortunately, I didn't file for a patent.
—DrCurry, Jun 06 2004
   

       Computer storage?   

       Did I miss something?
—DesertFox, Jun 06 2004
   

       wow.. //a full ride scolarship // - even better than the real thing !
—neilp, Jun 06 2004
   

       I could've sworn that the full ride comment was by someone else originally. Must have dreamed it. Gotta' stop eating pepperoni pizza.
—bristolz, Jun 06 2004
   

       I am the inventor of this idea and yes, i won a scholarship (invention convention) 5 years ago. If you look at the first comment, someone was blaming me on stealing THEIR idea, but obviously i didn't because the idea was thought up by me 5 years ago... that is why i mentioned it. Thanks for the comments!
—snboardcj, Jun 07 2004
   

       i have noticed serious swiss cheesing on here recently, either i can't read or some annos are vanishing immediately.   

       seems like a good idea would need serious health and safety checks to ensure the product isn't detrimental to the food.
—engineer1, Jun 08 2004
   

       Maybe just write the date on the celephane from when you put it in the fridge...
—hackermaster, Jun 08 2004
   

       Unless you can tell us what chemical you intend to use, this looks a bit like magic.
—angel, Jun 08 2004
   

       Indeed> I agree with [angel].   

       Also, what if the part of the food that has gone bad is not touching the wrap? Moldy bread starting at the plate-side, the rest is still good.
—hackermaster, Jun 08 2004
   

       I've seen a similar invention built into milk cartons to warn of spoilage. The indicator was simply a small plastic window that changed from clear to red when exposed to a certain signature chemical produced as milk goes sour. It was a great idea, but since it nearly doubled the cost of the packaging, it didn't catch on.   

       So I'd have to call this baked, although not widely known to exist. However, it's still a great idea, so (+)
—Freefall, Jun 08 2004
   
      
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