Old Glass Bottles Identification

Okay, I need to help the user with their research on old glass bottle identification. Let me start by understanding their query. They want a comprehensive article covering eight specific aspects, from definitions to market trends. First, I’ll go through each search result to gather relevant information. The user mentioned they’re writing an in-depth article, so I need to ensure each section is detailed with examples and data. For the first section, defining old glass bottle identification and its importance.