Lonely Krab is a fairly large box that is light yellow in color. It has the words "Lonely Krab" in the center with the words "Dinner for One" under it. It also has "Now 30% Lonelier" on the upper left corner and the price of $13.99 on the upper right, and contains realistic-looking food in a black TV dinner tray consisting of chicken breast covered with gravy, mashed potatoes, and peas. Imprinted above the tray is a realistic crab centered in between two teal brackets.
A box of Lonely Krab appears when Mr. Krabs grabs one from the freezer in Barg'N-Mart. Mr. Krabs comments on how the price is high but buys a bunch of boxes of the meal due to it being convenient. Lonely Krab also gives SpongeBob inspiration for developing Frozen Krabby Patties, which Mr. Krabs soon makes.