Group 1 - The article discusses the various types of bottled water available in the market, categorizing them into three main types: natural mineral water, purified water, and other types of drinking water [3][4] - Natural mineral water is sourced from deep underground and is protected from pollution, containing certain minerals and trace elements [3] - Purified water is derived from public water systems and undergoes processes like distillation and reverse osmosis, resulting in minimal mineral content [3] Group 2 - Other types of drinking water can be further divided into natural spring water, natural water, and other drinking water, with each having specific characteristics regarding mineral content and processing [3][4] - The article emphasizes the importance of checking labels for "mineral water" and the source location to ensure authenticity, as well as verifying the execution standards (GB 8537) for nutritional content [4]