This is the bottleneck! Corona Beer Unlike metal ones, it has a soft and warm sound. However, since it's glass, it will break if dropped on a hard surface. Please be careful! As this is a handmade item, please refrain from bidding if you are sensitive. Please judge from the photos. We have never received any complaints so far. Shipping is included via standard mail. Bundling is not possible as it is prone to breakage. If purchasing multiple items, please contact us in advance via the questions section. Shipping will be via Kuroneko Yamato cash on delivery. Shipping is via standard mail. Bundling is not possible. No discounts are available.