Anyone know who made these cobalt blue glass tumblers?

I picked these up at a low cost and now I'm thinking they might be recent. They have no safety rim. They are fairly large, measuring 3 3/4" high and 3 1/2" diameter at the top, they hold 12 oz. They have 4 puffy ribs, kind of like the Michelin Man. I checked Louie Glass in HMWII but this shape was not shown. Any ideas? TY!

 

That was my thought too
I checked Replacements for Louie and Weston.
They don't show much in cobalt.

I think the polished rim points to an older glass not newer.
Wait for others.

 

Hi,
I have a memory that Louie glass had 5 bulbous rings, I think Imperial had four. Dang, I have got to write more stuff down.
greg

 

Thanks! I'll check Imperial. Glad to hear you think they're older.