wangqh2696122 The store won’t create more waste when they throw away a cup This doesn't make any sense. The idea is obviously that if you bring your own cup to Starbucks and take it home as you leave, then the store won't have to throw it away (thereby creating less garbage) spent coffee grounds = small pieces of ground/crushed coffee that have been used / (spent)
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wangqh2696122The store won’t create more waste when they throw away a cupThis doesn't make any sense.