An article has just appeared in volume 57 of the Phycological Newsletter of March 1 on the famous roll collection bags that you have probably already seen in the stairwell (article available by clicking on the link)
Enjoy
Links
[1] https://static1.squarespace.com/static/543d47aee4b0f40897fde705/t/603d25af39706e75825a34f4/1614620084660/57.1.pdf