I highly recommend these hides sold by reptile basics, they are cheap, durable, and super easy to keep clean.
This picture shows the mini, small and medium sized hide boxes along with a 200 gram female Pastel BP. At the time of the picture she was using the small size.
Her in the hide
Her is the site where you evan get them:
http://www.reptilebasics.com/hide-boxes
Here is my current set up with medium hides. I have only once had a BP tip one over, 99% of the time this isn't an issue.
The biggest advantage of these hides over the plastic ones in the picture on your post is the reptile basics ones have the entrance off-center. this allows the BP to hide better in the hide and feel more secure.