Capri-Sun... Mold?

  Kraft foods have many cases where children are drinking their juice box and spit something black, green or really whatever color out of their mouth. The mold looks sluggish, and gross. Kraft foods claim it always happens if you leave the juice boxes out for awhile as so on the side of the box in molecular handwriting.
  I have had a experience close to it. Every year we help out at this fire department and sometimes I get thirsty and want a drink of juice. The fire department has juice boxes out that have probably been stowed away from last time which ranges from 3-6 months ago. I noticed that the juice boxes had foul tastes no mold, though. It makes those Raspberry ones that I hate in the first place taste extremely unbearable.

 I would suggest you take a high precaution when drinking/buying juice boxes. Check the expiration date and don't use them past the date thinking juice never goes bad. Well it does.