Netillah - 100% Pure Copper Netillah Cup. Purity Begins Here. Netillah is focused on educating and inspiring people to engage in the mitzvah of Netillat Yadayim (washing of the hands). Netillah is more than just a product. It’s a spiritual tool bound to fill your life with abundance. Performing the mitzvah of Netillah is known to bring a myriad of benefits into a person's life. Torah and Kabbalah state that copper has mystical qualities associated with good health, fertility, livelihood, and purity.