While jaggery syrup *can* be stored in plastic bottles, glass bottles are a safer and more recommended option, especially for long-term storage, due to potential leaching of chemicals from plastic into the syrup.
Jaggery syrup, being a concentrated sugar solution, can react with certain types of plastic over time. This reaction can lead to the leaching of chemicals from the plastic into the syrup, potentially affecting its taste and safety. While food-grade plastics are generally considered safe, the risk of leaching increases with prolonged storage and exposure to temperature fluctuations. Glass, on the other hand, is inert and does not react with food substances, making it a safer choice for storing jaggery syrup. To safely store jaggery syrup in plastic, ensure the plastic is food-grade (BPA-free is preferable), store it in a cool, dark place, and consume it within a reasonable timeframe (a few weeks). For longer storage, glass is always the better option.
Always sterilize your storage containers (both plastic and glass) before filling them with jaggery syrup. Boiling them for 10-15 minutes is an effective way to kill any bacteria or mold spores that could spoil the syrup.