As a former wedding photographer, I too put my film stock in the freezer. This retards the aging of the emulsion and extends the expiration date.
The one BIG caveat here is DO NOT OPEN the canister until it has reached room temperature. Doing so WILL result in condensation on the film, which, if loaded right away, will contaminate the inside of your camera.
How this all relates to the one-time-use cameras now on the market would be conjecture on my part.