How to Make Mason Jar Meals: Part 1: Purchase and lay out all the food you are going to prepare, and wash and dry your jars and lids. It helps to have a variety of jar sizes giving you different portion options. Meals I knew Himself would take to work went in pint-sized jars, snacks in half pint jars, and larger salads that more than one person would eat, went in the quart-sized jars...