I buried it shortly before we left for Florida last fall. Hubby mowed over it a few times & it survived intact. I expected it to be crushed & broken when we returned 2 weeks ago---That's why I waited until now to post the idea. It's fine. I just took another photo to show how it glows at night.
I used the 16 oz pickle jar because it was handy. Any size jar would work as long as the solar light fits inside. If the jar is too short you could always twist off the clear plastic part & use the remaining solar panel with the light bulb underneath. I left it on because I felt it would reflect more. Also, I will bury the next ones just a shade deeper so it's more level with the ground. I didn't allow for the soil compacting around the jar.