Please note: The composition of borosilicate glass allows for beautiful transparency and thermal stability but as with all glassware, please handle with care! Please note: The composition of borosilicate glass allows for beautiful transparency and thermal stability but as with all glassware, please handle with care! Yield Design Co. strives to create timeless pieces that are designed to last. Their line is at once a bridge between past and present, and a celebration of uncompromising quality crafted from enduring materials.