My kids would eat cereal for every meal if we let them, so a gallon of milk only lasts a few days.
We don't even buy chips. Somehow we still end up with a few half-eaten bags that slowly go stale in the back of the pantry until we get ambitious and throw them away.
Don't eat very many eggs, although we have started using them more on the weekends for breakfast.
We have 4 bathrooms in our house (master, one for each of the kids, and one on the main floor), and they are all used regularly. We will go through a 24 pack in a month.
Depending on the weather, a 6-pack of beer can last a day or a month. We only drink when the neighborhood is all gathered together, and it's typically when the weather is good, although we have started meeting inside a bit more (mostly for football).