It is constructed from zinc alloy body and stainless steel.
QUESTIONS? LOOK HERE!
Is it made of stainless steel?
Is this dishwasher safe?
Won't recommend to wash them in dishwasher
Is the copper all right with wine?
Yes , all fine.
Does this work for beer growlers?
I doubt it. They wouldn't be big enough.
Has anyone used these stoppers for champagne?
Yes these work great for Champagne-- Buy when you seal you must use a strong downward twisting force to create a strong enough seal to not pop off-- to take of you need to just twist to take out.