Starbucks greenlights customers to use their personal reusable cups for orders at locations across the U.S. and Canada, part of its effort to reduce waste by 2030. The coffee chain’s only stipulation is that the cups must be clean. Customers at participating locations will save 10 cents on their beverage, among other benefits. In addition to cutting down on waste and costs, Starbucks could see a boost in brand loyalty and sales as customers may be more incentivized to purchase the company’s reusable cups and tumblers.