New startup Vessel Works debuts cup-sharing program in Boulder

BOULDER — Vessel Works is a startup looking to expand the tide against single-use plastic to coffee cups with the launch of a reusable cup-sharing program.

The service works like a library, but for mugs rather than books. Users sign up for free and then can grab a reusable, insulated, stainless steel cup from participating coffee shops. They can enjoy their drink anywhere, even on the go. Users have five days to return the mug to any participating cafe, even a different one from where they originally purchased their drink. When signing up, customers do put a…