Protective housing for Acu-Rite 06002M or similar outdoor thermometer / temperature and humidity sensor. This will keep the sensor off the ground or table if you don't have a good place to hang it. You can turn the open front against a wall for more complete protection.
If you have bed adhesion issues, consider using a brim.
I increased the infill to 25% and filleted the walls to prevent them from pulling away from the back as it prints.