While you can buy staples like laundry detergent, trash bags, and eggs anywhere, Costco boasts some of the best prices on everyday products. In fact, you'll never pay more than a 14-15% markup on the wholesaler's stock thanks to its self-imposed cap. Superfans who know the retailer's prices better than most recently shared their favorite Costco staples that are so cheap (and high quality) that they're must buys. Not already a Costco member? You can apply here.
Prices and availability are subject to change.