During the Food TV show called Quick Fix Meals with Robin Miller her thing is to prepare parts of her weekday meals on the weekends so that dinner can be made fast.

In the episode titled: Passport to Flavor she begins the show supposedly during the weekend. She roasts a HUGE pan of vegetable to be used throughout the week. After using some of them in her weekend soup she puts two more servings of them in small plastic containers. They then take a break and when the show comes back it is supposed to be a totally different day, but when she picks up the container of vegetables to be used it is filled with steam and condensation. If it were a different day they would have cooled down by then.

I know that they don't actually tape one show over many days, but they really should have done something to make it less obvious that the veggies in the container were still pretty hot