Many of us receive return address envelopes from companies in the mail which we don't use. We can reuse those envelopes i.e. write your grocery list on the back side and put your coupons in the envelope.
About the author
Angela Kim is the Marketplace Public Insight analyst. She is responsible for outreach efforts that engage the public and encourage them to share their insights on topics Marketplace covers via social media, multimedia projects, and the Public Insight Network. Follow Kim on Twitter @angelaishere