Here's Why Starbucks Might Refuse To Fill Your Reusable Cup - Tasting Table
Briefly

Starbucks is addressing the issue of food waste and plastic waste, particularly with its cold drink offerings that primarily come in single-use plastic cups. The company promotes sustainability by encouraging customers to use reusable cups, which can be of any brand, but they must be clean to be accepted by baristas. Staff are trained to adhere to hygiene procedures and must use special holders to handle reusable cups, especially in drive-thrus. This initiative is part of Starbucks' effort to lead a cultural shift regarding single-use plastics.
"Starbucks supports reusable cups on many levels by allowing customers to bring their own, but they won't accept dirty cups for hygiene reasons."
"In a 2024 press release, Starbucks' chief sustainability officer stated that the company aims to shift away from single-use plastics by prioritizing convenience for customers using reusable cups."
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