Say that you crave a soda. Or a chocolate. Or even some prepackaged cereal.
Do you know what brands are suitable for a vegetarian to eat?
If not, I found a site than can help.
According to isitveggie.com, Diet Coke is fine for a vegetarian, but Pringles cheese and onion are not. Kellogg's Corn Flakes are fine, but Bird's Eye Crispy Vegetable Fingers are not. And all Nutri-Grain Bars are fine but Cadbury Creme Eggs are not.
Yes, but what about KettleChips and Mars candy bars and even Dr. Pepper? Well, drop by the site. The list is by no means exhaustive, but it is a good start. A very good start, indeed.