It's made of plastic, but not the usual junk from China that you find in a place like Wal-Mart or Target. This is made in Denmark--and you know how seriously Europeans take their coffee!
You might be able to find it elsewhere, but I bought my Gaggia espresso machine and grinder from wholelattelove.com because I looked at many coffee-related websites and I found them to have the best combination of price and customer service.
If you call you get to speak to a real live person right away, and they do know what they're talking about.
Thanks for the speedy reply. I would like to use these both for use at my home and to give to customers who still want me to grind their coffee. Is the plastic an issue with absorbing the coffee flavor or does it affect the coffee flavor??