The Primula 50 oz Cold Brew Glass Carafe makes rich, delicious full bodied coffee concentrate that is 65% less acidic than hot brewed coffee. This carafe makes cold brewed coffee that can last up to 14 days when stored in the fridge. BPA Free & Dishwasher Safe. The carafe is made of borosilicate glass and can withstand extreme temperatures without risk of cracking. The base has a silicone ring around the bottom for a secure grip to your table or side of the fridge door.