I’m going to have access to a 3D printer for a few days. I know two friends who’ve used them, but it’s only been for art and figurines, or professional purposes.
Are there any other cases you can think of where a custom-printed item is better than the myriad of mass-produced plastic items?
Ant nests and water dispensers.
Parts for many things that may break and are too old to find replacement or too expensive, like oven controls.
Supports for things in aquariums, like tubes or plants.
Supports for hanging keys, controllers, etc.
A bucket.
The thing is many times is cheaper to print and the things you print are specific to your needs.