We have some crafty Love Birds who always manage to get out of their cages. They have figured out how to work clips and undo ties, and even take off carabiners. So I created this device that allows the doors to stay shut without being too cumbersome for me to get in and change the water. Gravity keeps it in the right location, and to open the door, you just pull it out of the way. it can even serve to keep the door open if you want. It has been on there for a couple of weeks, and they haven't gotten out yet. supprisingly, they don't even chew on it.
I recomend printing with 100% infill so there is plenty of weight and if the birds do chew on it, they won't crack it open like a nut/seed.