and it stays purple.
The second glass turns pink.
And the last green.
So here's the trick.
1. Boil a few red cabbage leaves in water for about 30 minutes. Remove leaves and you have your purple water.
2. Fill one glass with bottled water, one glass with white vinegar, and one glass with water mixed with baking soda.
3. Pour cabbage water into each of the clear liquids.
And just for fun, mix them together to see what happens.
FYI- We found that our tap water has a base in it.