i used to ask for an extra everytime i bought a pigment. i always take out a small amount and put it into the sample container for the ease and convenience of my makeup bag. also this way I can keep all my full size pigments in one place, nice and safe. My fav ma used to always give me one and then one day she told me she couldn't anymore and got in a bit of trouble. I understand getting in trouble for abusing the policy and asking for a lot of them, but I was always spending at least $50 when I was asking.
I have since bought containers from kaliedescope cosmetics (i'm satisfied but the lids loosen very easily in my makeup bag), and a bunch from the mac pro store. i love the mac ones, but they cost so much compared to ones from other companies. I actually prefer the black sample containers that mac has the most, however. i wish they would sell those...