I found a blue bottle in an attic last week, wrapped in 20-year old newspaper. It has GENERAL WASHINGTON written on 1 side with embossed picture, and an eagle on the other, and the bottom has a "2" on it.
you have described a historical flask! now the only question is , is it the real thing ,or is it one of the newer reproductions. it would take a photo of the bottom and neck to tell for sure. the number 2 bothers me and makes me think it is a repro. pics would help.
Another vote for Lestoil. I have one that is sort of amythest-purple, and I understand they also came in blue and clear, were put out around the late 60's I think. One web site thought they were bicentennial commoratives, but I know I got mine before that.