US Patent 10913590 Mixing package and method

A pouch or package (e.g., flexible package) having a containment compartment or chamber to securely seal and to segregate fine powders or other such products from another area of the package. A powder resistant sealable filter material is included between, or extending between edges of, opposing package panels. Water, or other liquids, can be added to the product through the material as this material allows liquid to pass through it to mix with the powder, but restricts passage of the powder back through.