## 5. Think About How Often You Shop
Costco milk may be especially convenient for shoppers who already make regular warehouse trips.
If you’re visiting Costco every week or two, purchasing milk there can be part of your normal grocery routine.
But if your Costco is far away, the equation changes.
Driving a significant distance solely to save a small amount on milk may not make financial sense once fuel, time, and other expenses are considered.
The best Costco deals generally work when you’re combining purchases.
If you’re already going to the warehouse to buy groceries and household necessities, picking up milk at the same time can be convenient.
If you’re making a special trip just for one container, compare the overall cost with what you’d pay at a nearby grocery store.