Morsbags are named after the movement's British founder, Claire Morsman, who began making and distributing the bags in 2007. They are always free, and made of recycled materials. The aim is to keep plastic bags out of the environment, where they can cause harm to ecosystems and wildlife, particularly in marine environments.
Ms Williamson said a group had been set up in Whanganui called Plastic Free Whanganui. It planned to apply to Whanganui District Council's waste minimisation fund to "really launch alternatives to plastic in Whanganui".
Saturday's workshop is part of the Winter Wonderfest, organised by the Women's Network Whanganui.
The workshop begins at 10am Saturday at the Education Room in the Whanganui Resource Recovery Centre in Maria Pl.