This is a insert for the Board Game Gnome Hollow from The Op Games.
It fits the plastic "insert" the game comes with and is made for vertical or horizontal storage.
I used the BIT Project for this insert (https://github.com/dppdppd/The-Boardgame-Insert-Toolkit).
Edit: There is now a v2 of the Flower Tiles box with thicker walls so the Lid has more "grip" to hold on.
The author remixed this model.
Used the generator to generate the boxes