Yoo-hoo drinks doesn't come with sell-by date because yoo-hoo website states that product does not go bad (airtight containers).
According to StillTasty, chocolate milk will generally remain drinkable for about one week after the "sell-by" date on the package, assuming it has been continuously refrigerated; be sure to keep the temperature of your refrigerator at or below 40° F at all times.
To maximize the shelf of chocolate milk, do not store it on the fridge door, as the temperature is too warm - the chocolate milk will last longer when they stored in the main body of the refrigerator, in its original package.
The expiration date food system is confusing. Not only is there more than one date to try to understand ― best-by, sell-by, etc. ― but a lot of times those dates can be totally off. And consumers aren’t sure how to read them, so a lot of good food gets tossed because of those dates. Often times those dates are just recommendations by the manufacturer for best quality, not for when food becomes unsafe to eat.
Actually, some of those foods don’t go bad. Ever. That’s right, some foods will keep indefinitely, even if they come with a date.
If you’re tired of throwing out good food, it’s time you knew which foods never spoil.
Here are 11 Foods That Shouldn’t Ever Need An Expiration Date featured at Huffington Post.