What type of water should be provided clearly marked for drinking?

In the context of water that is safe for human consumption, the term "potable water" is specifically used to describe water that is fit and safe to drink. This classification means that the water has been treated or sourced in a way that it meets public health standards for drinking. Clearly marking water as potable serves as a crucial indicator to avoid contamination or misusage, ensuring people understand it is safe for consumption.

Filtered water, while potentially safe, does not inherently meet the standards of being potable unless it has been tested and confirmed to meet those standards. Similarly, mineral water and tap water can both vary in potability depending on their source and treatment; therefore, they do not universally represent water that is guaranteed safe for drinking unless otherwise specified. Marking water as potable is the most clear and universally understood way to ensure safety for drinking purposes.