3. How do I get rid of the metallic taste when drinking from the pitcher/tumblers?

Rinsing the pitcher and tumblers for over five times with tap water should get rid of it. Fill ⅔ of the pitcher/tumbler with tap water and shake well when covering up the openings using one hand and then pour out the water. Repeat this 5+ times. To be extra sure, leaving all of them filled with water overnight and then disposing of that water the next day will also help.