@tiny-ivy said:

A jar just traps a tiny, but it gives them no privacy and no coziness. It’s not shelter. It’s a prison, fit for a mere object or for a curiosity.

Yup, jars are for callous-to-cruel custodians.

However, I get the need to be able to see your tiny at all times. Might I suggest a terrarium? It can be furnished, including separate areas for watering, feeding, and toileting.

My ideal setup would have the terrarium on an extendible bookshelf that can be rolled back inside the shelving unit with a retractable front panel when concealment is necessary. When extended, the terrarium would be next to my desk chair with the top level with my desktop so I could keep an eye on her/them while I work.

Happy May Day!