This 7" tall, clear glass, square shaped bottle was used to hold bath salts. The stopper was molded into the shape of a cup, so that you could precisely measure the amount of recommended salt crystals to be poured into your bath water. Some people have confused this bottle with being an eye wash container and eye bath. The base of the bottle is molded with "Guerlain France Paris".
You can see the exact image shown in a 1924 Park & Tilford advertisement for Guerlain talc and bath salts. The top of the stopper looks kinda funny as the sealing membrane is covering the cup and making it slightly hard to see in the ad. Also, note that in the advertisement, the bath salts were available in only the L'Heure Bleue and Rue de la Paix scents at the time of printing. The frosted glass talcum powder bottle was available in Mitsouko, L'Heure Bleue, Rue de la Paix and Guerlinade.
You can see the exact image shown in a 1924 Park & Tilford advertisement for Guerlain talc and bath salts. The top of the stopper looks kinda funny as the sealing membrane is covering the cup and making it slightly hard to see in the ad. Also, note that in the advertisement, the bath salts were available in only the L'Heure Bleue and Rue de la Paix scents at the time of printing. The frosted glass talcum powder bottle was available in Mitsouko, L'Heure Bleue, Rue de la Paix and Guerlinade.