Think You Have It Figured Out? 

Follow  This  Printable  "Techie  Check  List"  To  Make  Sure  That  Your  Water  Bottle  Session  Goes  Smoothly

I adjusted the pH for storage.

I placed the samples in the refrigerator for preservation.

I readjusted the pH for experimentation.

I emptied the water bottles after the test was completed.

I rinsed out the empty water bottles, dried them with paper towels, and placed them in the dishwasher.