These all natural soft unbleached muslin bags are great for holding draining curds while you massage the curd to expel additional whey. Please Note: the threads are too course to drain ricotta. Easy to tie and untie a knot. The small size will hold up to curds from up to one gallon or a bit more of milk. The larger size will hold much more curd. These work great for hanging small batches of Chèvre or Feta curd.