Alicia Silverstone’s efforts were for nought when she brought a reusable mug into Starbucks.

The actress ordered a Starbucks coffee in her own reusable mug on Tuesday as a method to reduce waste. She was shocked to notice the barista pouring the coffee into a disposable cup and then into her mug.

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“Depressing! Just brought my reusable mug to Starbucks and saw staff use a disposable cup, pour it into my mug, then toss the disposable cup,” she tweeted. “Totally defeats the purpose of trying to reduce waste.”

“Then I looked around to see so many people sitting at the cafe all with disposables!” Silverstone continued. “Ugh.”

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One user on Twitter, who apparently works at Starbucks, explained the use of disposable cups as a sanitation issue. “It makes no sense but it’s our policy,” the user tweeted. “Even if you are in the cafe and come up get a refill, we are technically supposed to throw your cup away and give you a new one.”

A Starbucks representative told People they encourage partners to use reusable cups “whenever possible” and offer customers a 10 cent discount for bringing their own tumbler. Silverstone had more to complain about than just the disposable cups, read below.

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