In message , lnw
writes

Copper is very expensive so I've bought a few of those copper-coloured pot
scrubbers from Wilko. They're cheapish and appear to have a thin copper
coating, maybe they will work and snarl up the slugs. I intend to pull
apart a pot scraper and make it into a circle to fit around the top of a
pot. At any rate, the slugs will get theyselves cut up trying get through
the pot scraper, I hope.

We have been using adhesive copper tape around large containers of
hostas for the last 3 years and it definitely works as slug barrier. We
started off buying it in gc's at £5 for a 4 metre roll, but this year
found a supplier on ebay selling 3 x 3 metres for around £7.
--
Robert