If you're placing a new order, and you have an order waiting to ship, during checkout you may be given the option to combine them in the same shipment. (If the previous order is almost ready to ship, or the combined orders could not ship together using the same shipping method, you may not be given this option.)
If you wish to have separate existing orders shipped together, please contact customer service as soon as possible and we will do our best to combine them.
If you have multiple orders that are ready to ship at the same time, they may automatically be combined to ship in the same shipment even if you did not specifically choose to combine them during checkout.
If you wish to avoid the possibility of multiple orders being combined into one shipment, we recommend waiting until the first order has shipped before placing the next order.