(2-Pack, Medium 8in x 12in) Organic Cotton Cold Brew Coffee Bag - Designed in California - Reusable Coffee Filter with EasyOpen Drawstring Cold Brew Maker for Pitchers, Mason Jars, & Toddy Systems

I use a $5 pitcher from Walmart and a cotton brew bag I bought from Amazon. Leave it in the fridge for 18-24 hours and remove the bag of grounds. Rinse it and repeat as necessary. Here's a link to the bags I use but there's others available too. https://www.amazon.com/2-Pack-Medium-Organic-Cotton-Coffee/dp/B082PMF2GK Edit: adding context. I've found that I use twice the grounds for cold brew that I would use for hot coffee from a basic coffee pot. For 1 US gal I use 16oz of grounds. Lasts up to a week in the fridge. If you let it go past 24 hours while brewing it starts to pick up more of the bitter/acrid compounds that makes it taste a little off imo.

I use these ones https://a.co/d/06oSEolL