If you think you're having to pay extra for something, as we saw with the plastic bags, we think a similar psychological measure is needed, a nudge measure, to encourage people to remember to bring their reusable cup with them.
如果你需要為某個東西額外付費,比如塑膠袋,我們認為需要採用類似心理措施的「推力」,鼓勵人們自備環保杯。