Starbucks announced that it aims to have every customer either use their own personal mug or cup or borrow a reusable cup from their local Starbucks — by 2025. 

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The company has been testing various programs to determine what will most effectively reduce waste while keeping customers satisfied. 

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This change will directly contribute to the coffee chain's sustainability goals to conserve water usage by 50 percent and achieve carbon-neutral green coffee.

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Waste is an immense issue within the restaurant industry, and Starbucks itself distributes around six billion single-use cups every year, most of which aren’t able to be recycled and end up directly in landfills or the environment. 

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Starbucks won't get rid of the paper cups entirely, but they do want to make those options less appealing, so to phase out disposables, Starbucks is considering a borrow-a-cup program, where customers will be paying a deposit for a durable cup that they can take with them and then drop back off after use.

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Amelia Landers, vice president of product experience whose team is responsible for sustainable packaging at Starbucks, believes that this model will resonate more with customers.

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"I think that will take the lead. We are testing a number of different borrow-a-cup programs around the globe, including 20 different iterations, and in eight different markets." – Amelia Landers 

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Starbucks tested a beta version in Seattle. "We developed a new cup that had a very low environmental footprint, was lightweight polypropylene, ultimately recyclable, and could replace 100 single-use disposable cups," says Landers.

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Customers paid a $1 deposit and then returned the cup to a smart bin located in the store to get their dollar back. Customers also earned rewards for using the cup.