Cold brewed tea （冷萃茶） are as the name suggests, brewing the tea with cold water, but brewing may not be the correct word as this tea is made by putting the tea bags into a container with water and leaving it overnight in the fridge so that the flavours of the tea infuse into the water.
This also comes with a plastic bottle for cold brewing.
This collection contains 4 different teas in pyramid bags which contain;
Sun Moon Lake Red Jade Pyramid Tea Bag
Taiwan Native Mountain Tea Pyramid Tea Bag
Wenshan Baozhong Pyramid Tea Bag
Haulien Dah Yeh Green Tea Pyramid Tea Bag