The simple design matches any type of food. Made of heat resistant glass, it is good for long-term use. It can make cold brew coffee by placing water and coffee powder. The coffee is brewed slowly so that clear and rich flavor will be extracted. Made of glass, it is stain/smell proof even during long-term use. It won the Good Design Award that literally represents “Goof Design”. It will match anybody and any situation. Use & Care The glass body alone is compatible with microwaves and dishwashers. Do not heat it on open fire, which may cause breakage or burn. Heat resistant glass is different from reinforced glass that is resistant to strong impact. After use, wash it with a soft sponge and dish soap. Do not use abrasive nylon scrubbing brush, metal scourer, or cleanser, which may cause damage or breakage to the glass. Background iwaki Glass was founded in 1883 as the first private western-style glass factory in Japan. iwaki Glass was merged into AGC Techno Glass Co Ltd in 2013. The company manufactures and develops glass for lightening, industry, or optics, based on the technology of specialty glass that long accumulated.