Need help identifying the purpose

I have inherited this from my grandmother’s collection. I already know that it is 1928 Reed & Barton holloware footed bowl, as it states this clearly on the silver hallmark posts. The pattern reads 4020L. I have no idea what it’s pupose is for…my mother thinks it is a frog for centerpieces. I tried to include pics, but I cannot figure out how to add them to the post. It keeps telling me the file size is to large??? Anyway, whatever help or sites anyone knows of to help me out is appreciated. Thanks. oops, I forgot, it has a lid, that when placed upside down in the bowl looks very much like a frog.