back in the 60s during the Apollo space missions, the astronauts fell back to earth in a space capsule. During "entry level" the men endured a harrowing hurtle back to earth at excrutiating speed and intense heat. The stress on the body was enormous and sometimes would cause them to "eliminate" in their space suits. NASA however, anticipating this, came up with a large diaper (see: Lisa Novak) shaped very much like the popular "Speedy" (the name was also found to be quite appropo.)
Hence, the birth of the Entry Level Bag.
(wow. was my nose always this long?)