[Seil]

I prefer to make my own tacos.

Also, according to Cracked:

In the food industry, the practice of only halfway-filling containers with actual food is called "slack fill." Chip-makers want a cushion of air around their products as protection, because nothing sucks more than getting a bag full of smooshed chip bits, except maybe getting a bag full of empty, which is what it seems like sometimes.

The problem is that even though the FDA allows for some air space as food protection, sneaky manufacturers have been more than willing to abuse the system by halfway filling comically large bags with their products. So you think you're getting a big ol' bag of goodness when you're really not getting all that much ...

That sneaky dimple was put there for one reason: to put about two fewer ounces of peanut butter in the jar without the customer noticing. But manufacturers are keeping the prices the same, and sometimes even raising them. And peanut butter makers aren't the only ones pulling this shit, either.

A toilet roll might have the same number of sheets, but the sheets are an inch shorter, or worse, thinner. Cereal boxes are getting thinner while remaining the same height and width, to give the illusion of containing the same amount. A Hershey's chocolate bar has gotten an ounce and a half lighter yet sports the word "Giant," presumably because Hershey's thinks chocolate lovers are morons.

Apparently it's a pretty common practice to hide the food under a whole bunch of BS.