DON'T.
I was there in February and they tore all our bags apart. We were three hours in Chicago being searched. They took my son to one side and had him strip. Used unused it makes no difference to these nazis. Of the five packages we mailed home (legal stuff only) three made it ( one heavily damamged and obviously searched) Why bother? Take photos and have a great time. Go to Choclata for the BEST in baked goods and bon bons. Wow, I can still taste the hash. I like the Styx shop but Dolphins is great too. We named one of our sled dogs after the Siberie shop I have other posts with more info
or go to www.amsterdamhotspots.nl/ good site lots of good stuff
Doctor G