The milk carton that changes color before expiring


What a great idea designer Ko Yang has had with this milk carton that changes color telling us how fresh the milk is. The carton begins being white in color, and as the expiry date moves closer, it begins changing color to tell us we should drink the milk before it’s too late.

A brilliant way to help us consume our food without wasting any, something to which other ideators have already given some thought:

(31999) Expiry date for products that have been opened
(2255) Visual warning for expiry of food products

Maria Mazariegos from ideas4all

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15 comments sobre “The milk carton that changes color before expiring”

  1. Ashok Mehra dijo:

    What awonderfull Idea.

  2. Krishnamoorthy Raja N.R. dijo:

    Its a wonderful thought, would our country producers like to adopt, Many of them are dare enough to adulterated.

  3. Jay Kapossy dijo:


  4. Jay Kapossy dijo:

    Yeah sorry about the wtf?. I guess it’s pretty cool. :/

  5. BN dijo:

    How does this work? does it read pH of the milk?

  6. Klaire dijo:

    Is this now available in the milk producing and selling world? It would be great if consumers can purchase this product at the grocery stores to take home and transfer either fresh milk or days old milk to keep track of the expiration of the milk.

    Let me know when it’s available. I can market this in my area. Thank you.

  7. Adam E. dijo:

    This is just an ‘idea’. No sane person would practically make the entire milk carton change color and in that manner. My guess there would be some small indicator on the carton itself. No idea will see the light of day if it’s not cost effective.

  8. Ali R. Alreweli dijo:

    Yes Adam E. dijo, may be an indicator reading but how. I know it is just an idea need development or a research project. I think that could a biochemical process. The output of the idea will help the people if the cost accepted.

  9. Ali R. Alreweli dijo:

    if the cost accepted as you menthioned Adam E. dijo.

  10. hazem abdelrahman dijo:

    Please give details about manufacturer/ plant and his need for distributor in Middle East.

  11. Tony Pieris dijo:

    It’s this type of ideas that should be given recognition in this cruel commercialised world, may be even with a noble prize for humanatarian efforts.

  12. G Casha dijo:

    Wow ! What an idea. Hope it will catch all over the worlds and we get more like it especially on perishable items.

  13. jazzy dijo:


  14. Ravvii dijo:

    Better learn to protect the cows from the whole process of milking; by consuming less milk to begin with. Babies need mothers milk, cattle can grow with cows milk. If milk is replaced by soy or other substitutes. Fewer land use for raising herds, more options for farming corn,wheat, rice and reduce global warming. It maybe a better bet for mankind.

  15. Engineers for Common Sense dijo:

    An idea, neither new nor practical, typical of someone who has no understanding of the market/medium in which they’re dabbling.

    Containing active inks that require a chemical activation based upon the condition of the contents of a package breaches all sorts of physical and regulatory barriers intended to separate the contents of the package from the outside world.
    Add to this the marketting nightmare: “yes, we’re going to put active chemicals in contact with the stuff you’re going to drink”.
    Add to that the re-cycling issue: How the heck are you supposed to recycle previously benign cardboard and plastic packages when they have active chemicals in them?
    There’s more. Who’s going to pay? Consumers won’t pay the premium, so the dairy/producer will have to… and that’s no good for them. Besides, do they really want to have the risk of one package on a shelf advertising that the contents is going off? I think not.
    Then practicality. You have active chemicals in a packaging material that is going to be bent, heated, cut and bullied by the filling machine. How do you stop your chemicals from leaching from the edges and getting into contact with the end-users?

    Pretty and desirable, but utterly useless: the Paris Hilton of ideas.

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