Urine test strips. Dip sticks for checking:

Blood in urine (hemolyzed & non-hemolyzed)
Urobilinogen
Bilirubin
Protein
Nitrite
Ketones
Ascorbic acid (used for indicating potential false readings with other color pads - specific vitamin C test strips have more range)
Glucose
pH
Specific Gravity
Leukocytes