Walter Mischel's Marshmallows

Origin
Walter Mischel was known for his participation in the Stanford Marshmallow Experiment, which involved children either being given one small reward (a helping of marshmallows) or waiting for 15 minutes until being given a big reward (two helpings of marshmallows). This was an experiment on a phenomenon called delayed gratification.

Effects
The marshmallows within the bowl can be eaten as if they were normal marshmallows. However, the bowl can regenerate the marshmallows if they are eaten. There is one small catch, however. The user must wait for 15 minutes until the marshmallow bowl regenerates its marshmallows.