If your order has not been shipped yet, it might be possible. Please contact us and please make purchase for additional item and write the comment about combine shipping on "Order notes" .If there is any excess shipping cost, it will be refunded when we ship them out. But it may be shipped before your message is passed on to the shipping part. In that case, we will not be able to combine. Also, there are customer service holidays, your message may be handled up to 3 days later.
Jan 14, 2023