I will say it was not an experienced sledder who lost the pack because the lunch packed was ground down to a paste spewed through-out the pack. Experienced riders learn early in their sledding life that nothing will survive unless wrapped tight. I have seen beer cans with no distinguishable label after 1/2 hour, empty of course. Also had brother in law try to pack a banana. Nothing left but a brown skin. Made for a good laugh though.
Some-one went home disappointed and wish I could return the pack to them.