Measured in .5oz and ml. holds 3oz or 80ml. +Leakproof lids.

they are 13 bucks at target for a box of 12. but i am sure you could sell some to your buddies. or keep em around for your old lady. . .
http://www.target.com/p/Medela-Breastmilk-Feeding-and-Storage-Bulk-Pack-12-pk/-/A-10697113