Fangrui Product Details Cold Bubble Bag Is Made Of Biodegradable Non-woven Fabric, Will Not Affect The Flavor, You Will Get A Very Smooth Taste. The Filter Bag Can Be Used For Hot And Cold Brewing Coffee The Structure Is Very Good-the Coffee Filter Bag Has No Seams At The Bottom And Strong Double Stitches On Both Sides, Which Can Withstand Any Agitation, Shaking Or Boiling Process. The Fine Mesh Allows Water To Freely Soak The Coffee Grounds, Whether It Is Coarse, Medium Or Fine Size-the Mesh Brewing Drawstring Bag Is 4 X 6 Inches/10 X 15 Cm, Can Hold A Cup Of Coffee Powder, Fits A 32-ounce Mason Jar. The Cotton Drawstring Design Is Easy To Use, And The Knot At The Top Can Ensure The Safety Of The Item No Mess And No Precipitation-help Skip The Messy Cleaning Work, Use Coffee Filter Bags To Make Cold Brew Coffee At Home Easy, No Coffee Grounds, Clean And Tidy. Enjoy Your Homemade Smooth Cold Brew Drink Multi-purpose Cold Bubble Bag-filter Bag Can Be Used For Coffee, Loose Tea, Herbs, Spices, Lavender, Potpourri, Herbal Powder