Simple notebook stand with lock in feature

I came across a few of these laptop holders, but none of them could be stored together and if they did they did not lock in place. Therefore I made my own and first try it worked. You can insert one of the holders to the second one and snap it in place with enough holding power that it does not separate on its own. Print it laying flat on the bed. Enjoy

Design by Bobino on MakerWorld (license: BY-SA).