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WHY borosilicate glass?
All our glassware are entirely made of high quality thick non-fragile, lead free, heat-resistant durable borosilicate glass (pyrex glass),
no plastic or metal parts. Borosilicate glass has a very low thermal expansion coefficient, about one-third that of ordinary glass.
This makes it resistant to thermal shock, more so than any other common glass.
Borosilicate glass composition is about 70% silica, 10% boron oxide, 8% sodium oxide, 8% potassium oxide, and 1% calcium oxide (lime), no
lead or anyother heavey metal is added so it is very safe to use with any beverage. Its superior durability with microwave and dishwasher
compatibility makes it ideal material for high-quality beverage glassware.
Why is SUN's Tea double-wall glassware unique?
The unique double-wall thermal beverage glass is the only NON-FRAGILE double-wall glassware you could find. It is made of strong, lead-free,
heat-resistant and long-lasting borosilicate glass, which can stand a sudden heat or cold shock and can take impact from free-fall ice ball
from as high as 16 inches.
The air between the unique doule-wall structure keeps the cold drink cold and the hot drink hot for a long time. You can hold a glass of
very hot drink without getting your fingers burned, or hold a extreamly cold beverage without water condensation forming on the outer wall.
The outer surface feels and looks not cold, not wet, not hot, it is JUST COOL !
It is microwave safe and dishwasher safe!
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