Two Ugly Dudes on Day 11 - Photo #1 of 5

Here you find Tom Kaspar [apollodorus] and me enjoying our morning cup of joe at Frosty's Claustrophobic Bivi, located nearly three-thousand feet high atop El Capitan's mighty Southwest Face.

This is a riddle:

Frosty's Claustrophobic Bivi on Excalibur has an area of one hundred square feet, and it has a volume of one hundred cubic feet.

Describe the bivi.

Can you guess? Please click here for Dr. Piton's [hint] and to go to photo #2 of 5.