Any US import charges will be covered by The Pottery Parade. However, this is not yet an automated process. In case you get charged with fees upon receiving your package, please email your payment receipt to thepotteryparade@gmail.com for a refund. 

The Dutch mailing company PostNL is currently working on a shipping process where charges are automatically forwarded to me, so you will never be surprised with extra charges upon receiving your packages. This should go in effect within the next few weeks.