450cc [Double-layer glass] Heat-resistant double-layer glass (including glass lid + glass straw)

**Please click [Contact Designer] to remark the engraving content (Chinese, English, Japanese and Korean numbers are acceptable)** Brand: MSA GLASS ENGRAVING Material: (double-layer cup) hand-made glass products / high borosilicate heat-resistant glass / Silicone ring glass cover (stable box cover does not collide, can be removed) Material: (glass straw) borosilicate heat-resistant glass/outer diameter Ø about 0.8cm/curved type/flat mouth/total length about 20cm Gift: 1 special cleaning brush for glass straws Size: 5.5cm in diameter x 16cm in height / 480cc Range of customization: name or a short sentence (Special custom orders are quoted separately according to the complexity, welcome to provide customized drawings) https://shoplineimg.com/5600b9d7039055a866000051/5d9d790a6bd1272aabc1b7e8/1600x.jpg **Special reminder for double cup** 1. Hand-blown glassware has individual tiny bubbles, flow marks, and hand marks, etc. Non-defective products! 2. The slight differences in roundness, height, radian, etc. are common in the same style of products, which is a reasonable phenomenon, which is all caused by pure manual craftsmanship. This point is also the key to distinguish between artificial blown and machine-made products! 3. The value of manually blown glass is generally 8-10 times higher than that of automatic production line utensils. The artificial blown products produced under the premise of reasonable control have unique special value. 4. Due to the double-layer design, there is a vent at the bottom of the cup, which is not a product defect, and this vent is sealed with a special material to ensure that water does not enter the double layer (do not soak in water for a long time) due to the bottom of the double-layer cup Adhesive spots are traces of normal craftsmanship and are not defective or quality problems. Pay attention to protecting this spot during use. 5. It is recommended to use rinsing when washing. Do not soak the bottom of the cup in water for a long time to avoid double-layer water or steam. 6. When washing, do not scrub or dig the vent hole to avoid penetration damage. In view of the above tips, any double-layer water ingress caused during use cannot be returned or replaced. Please make a purchase after understanding. **Special reminder for glass straws with double-layer cups** 1. Please don't put the glass straw directly into the glass when it is empty, it will cause damage when knocking against the inner glass. 2. The straw material is hard. Don't repeatedly poke and hit the bottom of the glass in the cup. https://shoplineimg.com/5600b9d7039055a866000051/5d9d7afb2ca1f24b0844efd2/1600x.gif https://shoplineimg.com/5600b9d7039055a866000051/5d9d7b0cdb31e775606e9de6/1600x.jpg https://shoplineimg.com/5600b9d7039055a866000051/5d9d7b447658b37578346951/1600x.jpg