What happens when we lose the orange binkie?

Around Christmas Ben decided that he only wanted to use the orange "binkies". At that point we had 2 and that was fine. Of course we're now down to 1 and Martins doesnt have any more. I do have a couple of blue ones but I'm sure if he'll use those or not. So this morning I said "We only have 1 orange binkie left and there are none at the store so if we lose the orange one on the big aeroplane you'll have to use a blue one" .. Ben pondered this and then said "When we go on the big aeroplane we might lose the orange binkie and then I'll sleep with nothing" .... I'll let you know.