Double-walled glass with double structure on the side] [Glass tea ware] is very popular. "Regardless of summer or winter, we use glass tea utensils all year round." "The color is beautiful", "The change in the color determines the extraction", etc. A series commercialized from the real voices of consumers. Not only is it fashionable, but it is also supported for its heat resistance, dishwasher OK, and ease of use, such as being able to be used for more than just tea. It prevents temperature changes due to outside air, and the air in the middle layer acts like a heat insulator, and has the effect of heat and cold insulation. ・[Hot] Not only does it have a heat retention effect, but it is also a nice function that you can hold it immediately even with a freshly brewed hot drink. ・【Ice Cream】 The cold insulation effect and condensation resistance prevent ice from melting, and prevent it from getting wet due to condensation on tables and cups.