Those tennis rackets came as part of a sports collection, you could choose a racket or a golf club in the mid-seventies. They originally came with the classic green juice. The fact that it is brown leads me to believe that it has either been refilled with something else or changed color. I've seen some bottles turn a really dark green, but not brown.
Give it the old sniff test. Let us know.
Cool find.
I've seen a few Skin Bracer bottles while hunting razors. Some regular some decorative, but they have all been empty and priced higher than I wanted to pay. I hope to find a full one someday. I would expect it to be green though.
I ran across this a while back, right before I got into traditional wet shaving. It was sitting next to a bottle of Avon Spicy that was shaped like a DE razor.