Walk your lunch...

or, edible pets.

It can be quite a lot of work to bring lunch from one place to another. You have to hold it, your hands aren't free. If you have a drink too, how will you open doors? (You don't open doors for people?! You are a terrible person.) And yet, during lunch time, especially on a nice day, people are often out walking their pets. If only we had edible pets. They would be a sort of living, walking, tofu dog -- the pet would need to be edible without cooking, or you could only go for long walks on very hot days and that would mean that you'd need to live in Texas, which would mean that you'd never eat tofu, unless it was made of meat.

On a related note, I wonder how salamanders taste.