Search within a List

As a user, I want to be able to enter items in a grocery list in any order they come to mind and be able to dynamically reduce the items to those matching a search term I enter so that I can find all of the items of a certain type or matching a certain name as I walk through the grocery store.

For example, I want to enter the word "cheese" as a search term and have the list show me: cottage cheese, cream cheese, shredded cheese, etc.

It would also be nice if I could enter a category such as "frozen" and have the list show me: ice cream, frozen egg noodles, frozen pizza, etc.