Almond Milk Recipe
Since it required a "nut milk bag" I was sure I could find someone talking about this elsewhere. Here are some ideas.
This forum, had these examples:
I read something by Carmella from The Sunny Raw Kitchen and she uses paint straining bags that you can find at a paint supply store or at Home Depot (I got mine at Home Depot). They are nylon and come in two sizes. I got the smaller ones. One package has 2 bags in it and was around $3! So that's $3 for 2 bags! I just cleaned it really well in hot soapy water before using and it has worked wonderfully thus far.
I have only ever used cheese cloth. typically it is easier to find and works pretty well. it helps to have someone help you keep the corners up. (I say why not just sew the cheese cloth into a bag???)
And I saw somewhere else someone used a flour sack.