To draw a box-and-whisker plot, follow these steps:

1. Arrange the data in ascending order: 14, 15, 17, 18, 19, 19, 21, 22, 22, 23, 24, 25, 26, 26, 28, 28, 30, 32, 36, 38, 41, 42, 45, 46, 47.
2. Find the median (Q2): The median is the 13th value, which is 26.
3. Find the lower quartile (Q1): The lower quartile is the median of the first 12 values, which is the 6.5th value, calculated as \\((19 + 21) / 2 = 20\\).
4. Find the upper quartile (Q3): The upper quartile is the median of the last 12 values, which is the 18.5th value, calculated as \\((36 + 38) / 2 = 37\\).
5. Draw the box from Q1 to Q3, with a line at the median (Q2).
6. Draw whiskers from the minimum value (14) to Q1 and from Q3 to the maximum value (47).

The box-and-whisker plot should have a linear scale with the axis labeled as 'Glasses of water'.