64 oz Soda Lime Glass Mason Jar
The jar is a standard 64 oz, 2 quart wide-mouth mason jar in heavy-duty soda lime glass, BPA-free and food-grade throughout. Glass has two real advantages for cold brew. It is inert and non-porous, so it will not take on the smell or taste of previous batches, and it stays clear rather than slowly clouding the way plastic can. A thick mason jar is also sturdier than most glass carafes, and one owner chose it precisely because thinner cold brew carafes have a reputation for cracking. The trade-offs are weight and heat. Empty, it weighs 1.13 kg, and a full batch makes it a two-handed job for many people, especially coming out of a fridge. Soda lime glass is also vulnerable to thermal shock, so County Line is explicit that warm or boiling water should never go in, which rules out hot-bloom shortcuts that some cold brew recipes use to speed things up. A wet jar can also be slippery at the sink, so a firm grip, or a rubber glove, makes washing safer.