Most Clever Little Jars!
10 clear plastic screw top containers
 Heavy Plastic Cylinder with lid of same clear plastic material.

Opening is a tad more than the size of a penny or 3/4 inch   (12/16th & about 19mm) 
Holds exactly 1 teaspoon in fluid volume. Tad over 1" high (let's say 1-1/8" with 1" diameter. (30mm x25mm)

Wide Mouth - easy to get most pills into.  (pennies can easily be stacked inside!)
Strong enough to take tough treatment.
Smooth enough not to damage anything in your purse as they have no corners!