250cc [customized double-layered cup] handmade double-layered cup, insulated and non-hot, customized Italian espresso cup

**Please click [Contact Designer] to remark the engraving content (both Chinese, English, Japanese and Korean numbers are acceptable)** Brand: MSA GLASS ENGRAVING Designer hand-carved Material: handmade glass products/artificially blown borosilicate glass Heat resistance: instantaneous temperature difference -20℃ to 150℃, expansion coefficient 3.3 Size: Cup mouth diameter 8.3cm x height 9cm, bottom diameter 5cm (manual measurement) 250cc **Customization scope: name or a short sentence** **(Special customization will be quoted separately based on complexity. Customized drawings are welcome) ** **Each batch is handmade and slightly different.** The air layer formed between the double-layer glass effectively slows down the heat exchange inside and outside the cup. Whether it is filled with higher-temperature tea and coffee, or lower-temperature ice water or cola, your hands will be at a suitable temperature. **Special reminder for double-layer cups** 1. The existence of tiny bubbles, dots, flow lines, and hand marks on hand-blown glassware is a normal phenomenon in the manufacturing process and is not a defect. Please agree with the above characteristics. 2. It is reasonable for products of the same style to have slight differences in roundness, height, curvature, etc. This is all due to pure manual craftsmanship. This point is also the key to distinguishing artificial blowing from machine-made products! 3. The value of hand-blown glass is generally 8-10 times higher than that of automatic production line vessels. Artificially blown products produced under reasonable control have unique and special value. 4. Due to the double-layer design, there are ventilation holes at the bottom of the cup, which is not a defect of the item. The holes are sealed with special materials to ensure that water will not enter the double layer (do not soak in water for a long time). Due to the holes at the bottom of the double-layer cup, The adhesive spots are normal workmanship traces and are not defects or quality problems. Please pay attention to protect this spot during use. 5. It is recommended to rinse 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 the ventilation holes vigorously to avoid penetrating damage, water or steam intrusion. In view of the above tips, any double-layer water intrusion caused during use will not be responsible for any return or exchange. Please understand before purchasing. 7. Only put ice cubes/glass straws/stirring sticks/spoons, etc. when there is a drink in the cup. Avoid putting hard objects directly into the inner glass at the bottom of the cup, which may be easily damaged due to external force knocking. 8. It can withstand temperature differences but cannot be heated by microwave or gas stove to avoid damage and cracking.