In Jainism, the practice of consuming water is guided by the principle of ahimsa (non-violence). Jains are very careful to minimize harm to even the smallest living beings, such as microorganisms that may be present in water.

Boiling water is a traditional Jain practice to reduce the number of living organisms in it, making it purer and less likely to cause harm when consumed. However, storing boiled water in a fridge is generally discouraged in traditional Jain households for these reasons:

1. Recontamination: After boiling, water is considered pure for a limited time (usually up to 24 hours). Placing it in the fridge does not prevent the growth of microorganisms; in fact, over time, new organisms can develop even in cold conditions, especially if the container is not sterile.

1. Avoiding Modern Appliances: Traditional Jain practices encourage simplicity and natural living. The use of modern appliances like refrigerators is sometimes minimized, especially in matters of food and water storage, to avoid unnecessary complications and reliance on technology.

1. Purity and Freshness: Jains emphasize consuming fresh food and water. Storing boiled water for long periods—even in a fridge—is not aligned with the ideal of consuming the freshest and least contaminated items possible.

1. Religious Observance: On special days (like Paryushana or during fasting), stricter rules may apply regarding water storage and consumption, often requiring water to be freshly boiled and consumed within a short period.

Therefore, from a Jain perspective, boiled water should be consumed within a certain time frame and not stored in the fridge to maintain purity and adherence to the principle of non-violence toward even the tiniest living beings.