I have never seen a grave marker like this before. It appears that you can take off the top and replace the flowers or whatever when you want. It's handy as it keeps the flowers off of the ground which can be a bother to maintenance but I question the actual use and upkeep of something like this.
Clara. Lutz. Pardee
1921 - Age - 41
I assume this grave marker was made by Perry Johnson of Topeka, Kansas because that is what's printed on the lid. I was unable to find any patent information on it.
Worden Cemetery, Willow Springs Township, Douglas County, Kansas