The beverage category is one of the most consistently overlooked savings opportunities in the Costco member experience — and one of the most financially significant when the full annual beverage budget is analyzed. The average American household spends approximately $1,200 to $1,800 per year on beverages — coffee, energy drinks, sparkling water, juice, sports drinks, and the protein shakes and functional beverages that have grown dramatically as a spending category in 2026. M