(like a bag) or a digital product/file ?

(e.g., Etsy, a specific designer's website)? With more details, I can tell you exactly what’s inside.

Known for detailed instructions, such as in the "Treasures and Trinkets" series.

However, focusing on the content of the results—which emphasize high-quality bag-making, organization, and zipper techniques—here is an informative review of current popular "zip-up" sewing projects and accessories found in the search: Overview of "Zip-Up" Sewing & Bag Projects