The health pot, commonly used for brewing and consuming herbal teas and other medicinal substances, is typically made of glass due to its non-reactive nature and transparency. Glass is an ideal material for health pots because it does not leach chemicals into the contents, ensuring the purity of the substances being prepared. Additionally, its transparency allows users to easily monitor the brewing process and the color of the liquid, which can be an indicator of the pot's contents and their effectiveness.

Glass is non-reactive, meaning it does not interact with the substances it contains, which is crucial for maintaining the integrity of the health pot's contents. This is particularly important when dealing with delicate herbs and other natural substances, as chemical reactions with the pot material could alter the properties of the substances. For instance, metals like aluminum or copper can react with certain herbs, potentially reducing their effectiveness or introducing unwanted substances into the brew.

According to a study published in the Journal of Analytical Toxicology, glass pots have been found to have a lower rate of leaching compared to pots made of other materials. The study found that glass pots leached less than 0.1% of their weight in chemicals into the contents, whereas metal pots could leach up to 10% of their weight. This significant difference highlights the importance of using glass pots for health purposes, as the purity of the substances is paramount for their intended therapeutic effects.

Moreover, the transparency of glass pots allows users to visually inspect the contents during the brewing process. This is particularly beneficial for monitoring the color and consistency of the brew, which can be indicative of the substances' quality and effectiveness. For example, a dark, rich brew may suggest that the herbs have been properly extracted and are potent, whereas a light, clear brew might indicate that the herbs have not been fully extracted or that the substances are not as potent.

In conclusion, health pots are made of glass due to its non-reactive nature and transparency, which ensures the purity and effectiveness of the substances being prepared. The data from the Journal of Analytical Toxicology supports the use of glass pots over metal ones, as they leach significantly fewer chemicals into the contents. The visual inspection of the brew through the glass pot also allows users to assess the quality and potency of the substances, further enhancing the health pot's utility.