you can't really sanitize pigment. but since the product is dry, it doesn't harbor germs like liquid and emollient-based products. moisture is really what germs and bacteria need in order to cultivate and reproduce, to pigments are pretty safe, since they're completely dry. clean sample jars can be purchased at online retailers, like miss marley said, or on ebay, or through select beauty stores. use a clean spoon, and only use jars once, and you should be fine.