Clear Square Flask Bottle (D 1230 Type)

This item is an antique or vintage clear glass bottle, characterized by its distinctive square cross-section body and relatively short, tapering neck. The bottle is constructed from colorless, translucent glass, exhibiting a utilitarian design commonly associated with flask bottles, possibly used for spirits, pharmaceuticals, or household liquids. The main body features four flat panels, forming a square silhouette, with corners that are gently rounded rather than sharply angled. The shoulders of the bottle smoothly curve inward from the square body to transition into a circular neck, which then terminates in a simple, unembellished lip. While precise measurements are unavailable, it appears to be a medium-sized bottle, likely ranging from 6 to 8 inches in height. Visible condition issues include significant interior cloudiness and residue, commonly referred to as "sick glass" or "bottle sickness," which is indicative of prolonged exposure to liquids, minerals, or environmental factors. This cloudiness is a form of patina that has developed over time. The exterior surface shows general scuffing and light scratches consistent with handling and age, but no apparent major cracks, chips, or fractures are discernible. The base of the bottle exhibits a slightly concave punt, a common feature in blown or molded glass bottles, but no clear embossed text, maker's marks, or mold numbers are distinctly visible in the provided images. The lip appears to be a continuous thread finish designed for a screw-top closure, rather than a cork or crown cap, suggesting a manufacturing period likely from the late 19th century into the first half of the 20th century, consistent with mass production techniques. The "D 1230" provided in the context implies a specific design patent or catalog number, indicating it was a standardized product. Its craftsmanship is functional and robust rather than decorative, typical of bottles produced for widespread commercial use.