From the 1940s & 1950s by Hazel Atlas, this creamer is in their fired on Green. There were four different colors of these milk pitchers that were fired on over the Hazel Atlas Platonite white. These little ribbed milk "jugs" or pitchers are part of what Hazel Atlas called Gay Rainbow glassware.
Their original collection of four included this Jadeite shade of Green, a Reddish Orange (which some collectors label as red though I see this color as orange), Cobalt Blue and a deep Canary Yellow. The Gay Rainbow jugs were offered as promotional items with KIX Cereal in the 1940's. The small milk pitchers are 4" tall. This one is in Excellent Condition. The paint remains nicely intact with only a small rub (an area of paint loss) on the bottom as shown. No chips or breaks found.
Please see other listings for Gay Rainbow Pitchers within this shop; currently a listing for all four colors (like the last photo), three colors, and a couple of individuals jugs like this one.