I don't remember exactly, but I purchased this from a reputable manufacturer. I believe it's made of aluminum. 300g Used 1-2 times. For this listing, I transferred it to a Ziploc bag without touching it. * I plan to ship via Yu-Packet Post or Yu-Packet Mini (anonymous shipping). * I do not have any pets or smoke. * I will ship using simple packaging, reusing household materials and used packaging materials. * I am also listing this on other sites, so I may have to cancel the transaction depending on the timing. Thank you for your understanding. Please feel free to ask if you have any questions.