Hand Wash fine porcelain/china and glass and do not place in the dishwasher or microwave. I do not know the materials used in production, and I cannot guarantee an items durability. Antique porcelain, glass and other vintage items are fragile and may not be best suited for use.
I recommend that you use the vintage items I sell for decorative purposes. The item "Beautiful Finely Cut Ruby to Clear Crystal Wine Stem" is in sale since Saturday, November 26, 2016. This item is in the category "Antiques\Decorative Arts\Glass\Stemware". The seller is "affordablechina" and is located in Bethesda, Maryland. This item can be shipped worldwide.