Mid Century Bar Glass - American?

The green 4 piece set I found in an antique shop in the 1980's. The color is (I call it Apple green). Then in 2015 I found 3 of the same ones in a violet/grey color at a flea market.

They have a clear weighted base that has an indent. Would love to know more about these. Believe me, I've spent months over the years gazing through Google images to find a match.

Would you agree these are mid century? I thought they might be Czechoslovakian. Not American. Any help would be appreciated.