A plausible explanation for these mysterious glass vials is that they are vintage perfume bottles. In the mid-20th century, perfumes were commonly sold in small, disposable glass bottles. These vials were designed for convenience, allowing people to carry their favorite fragrance with them without the need for a large bottle. The liquid inside the vials is likely a concentrated perfume, preserved for decades thanks to the airtight glass seal. Popular among women: an essential accessory in every handbag.