How to choose bowls for this practice?
The principle of choosing a singing bowl is the same, it is based on chakra knowledge. See which chakra is connected the most to your intention.
If you have doubts, you can always take F3 bowl, as a heart bowl it will work perfectly for the intentions settings.
Middle-size bowls are the best for this practice, around 20 - 25 cm in diameter.
After practice you can give water to a person, it can be stored or used for drinking. One more way to enhance the effect is to water a plant with this charged water. The same as the plant will grow, the intentions will also grow with it.