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.