Answer:
2 acids found on the daily:
-milk (pH level: 6.5) -- consumed through drinking.
-toothpaste (pH level: 6.8) -- used to brush teeth.
2 bases found on the daily:
-hand soap (pH level: 10) -- used to wash hands.
-printing ink (pH level: 9) -- used to print files onto paper, such as printing out school assignments or job resumes.