A simple fence that discourages snails and slugs - it's hard to slide over, faces outwards and interrupts the natural 'shortest path' to the food. Also has spikes on top for last line of discouragement.
The wall is a fence rather than solid so that sunlight can still get to the plant.
Printed with a brim because the thin mesh needs stability while printing. You can optionally leave it on afterwards and bury it in the soil for stable installation.