Water bottle caps in India come in different colours not just for branding or aesthetics—they actually convey specific information about the type and quality of water inside. Here's what the Cap Colours Indicate. Blue Indicates regular packaged drinking water. Most commonly seen. Green Signifies natural mineral water, sourced from underground springs or aquifers. White Often used for purified water or distilled water, typically for medical or lab use. Black May denote alkaline water, which has a higher pH and is marketed for health benefits. Yellow Sometimes used for flavoured or vitamin-enhanced water, though less common. These colour codes help consumers quickly identify the water type, especially in retail settings or while traveling.
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