How it works STEP 2 *Mailing Milk* Once you've placed your order within 24-48 business hours, we will email you detailed instructions on mailing your milk to us. If you are in the USA, you have the option of getting a pre-paid mailing label or sending with your own postage. If you are international, you will be responsible postage to get your milk to us. But the process for packing the milk sample is the same for both domestic and international. It is highly recommended that you mail your milk within TWO WEEKS of ordering. If you are not ready to mail your milk, it is best to wait to place your order. If you are mailing other items like hair, placenta, or flowers with your milk, each item needs its own ziplock bag and to be labeled. Hair NEEDS to be tied into a lock with a piece of string. PLEASE let us know you are sending these so we can document on your file & prep for out intake properly. Notes: Milk does NOT need to be shipped cold. Fresh, previously frozen, and even expired milk works great! Please only send what we need as this prevents leaks during transit. If you have a frozen bag with more than 0.5 oz, you'll need to thaw and remove 0.5 oz into a new breastmilk bag.-Secure half an OZ of milk inside a sterile breastmilk bag. -Label Bag with order # + first and last name-Place breastmilk bag inside of a ziplock baggie (freezer ones are best for preventing leaks). -Label ziplock with order # + first and last timeSecure in a bubble mailer -Attach mailing label and send off! (If you are using a pre-paid domestic label, these are shipped via USPS) *INTERNATIONAL orders, please label the outside of your bubble mailer with your order number.*