A poison bottle is a specially designed container used to store toxic substances safely. Historically, these bottles were made with unique shapes, textures, and colors—such as cobalt blue or emerald green—to differentiate them from regular medicine or beverage bottles. Many featured embossed patterns, like ridges or skull-and-crossbones symbols, to warn users even in low light. These designs helped prevent accidental poisoning, especially in the 19th and early 20th centuries. Today, poison bottles have largely been replaced by modern child-resistant packaging, but antique collectors still seek them for their historical and aesthetic value.