Monty the tabby sparked a huge search when his devastated owners noticed he had disappeared.
They resigned themselves to never seeing him again but Monty has proved miracles do happen.
The 12-year-old family feline was found after two months by a passerby who heard his cries in the back of a lock up.
Monty had got himself stuck inside the container in Helston Gunsmiths Trading Estate only 300m from his real home in Cornwall.
The owner had returned after two months away and was stunned to find Monty alive inside.
The ingenious furry friend survived for weeks by licking condensation and chowing down on spiders.
He has been reunited with his owners and despite losing two thirds of his weight is recovering well.
Beverly, 59, who lives with husband Paul, 55, in Helston, Cornwall, said: "He was very skinny and had lost a lot of weight.
"I think he must have survived by eating spiders. It was the only thing he could have eaten as there were no holes for rodents and he must have been drinking condensation as it ran off the walls.
"He is now roaming again where he shouldn't be. But he is putting on weight again, which is very pleasing.
"It is not unusual to not see him for a week as he has a second home he likes to visit as cats do.
"But no-one had seen him for a few days so we put out pictures on Facebook and had no response.
"We were hoping for the best but expecting the worse and thought he might have been hit by a car or got lost and couldn't find his way back.
"He had not been seen for eight weeks but on my first day back at work a picture of him was put on Facebook. We knew he was ours and my daughter went down to pick him up.
"You hear about these things but we could not believe it. He was so close to home, about 300 metres away, all this time. It is amazing to think he survived for so long as he is an older cat.
"We are just all so pleased that he was found."
The owner of the shipping container told Beverly he must have opened it for some reason but had not been back for two months. Someone then reported the noise in the container and he went back to check.
Beverley, a teacher, said: "We had given up hope after about seven weeks of ever seeing him again.
"Monty does like to roam and he might go off for a week or two but this was different.
"But then I was tagged by a friend in a post from Blackfords Removal, who checked it out after a member of the public heard a cat crying outside their storage unit.
"They rushed to open it as it had been closed for two months."