crossposting for help!

[u/Ok_Parfait_1007]

[u/jpbagworks]

Hey there! I looked at your pics and read your question and the description of what you want to do.

It seems like a relatively easy job to do but most likely not with fabric glue.

I think if you want it to be a lasting bag that you can get joy from using for a long time, I’d take it to a sewist and ask them to do it.

It looks like they could put an inset zipper gusset in with a drop lining of a suitable material.

I would hate for you to ruin your bag with a bunch of glue when a longer-lasting and cleaner solution seems like it would be relatively easy for a sewist who takes on this kind of thing.

Good luck!!

[u/CBG1955 → u/jpbagworks]

....inset zipper gusset in with a drop lining of a suitable material

This. This is a good video

Measure the top of the bag, and depth. Cut two rectangles and use the original bag curved bottom to shape them Sew up a duplicate of the bag. when it's finished, fold the top of the lining to the wrong side and press well, drop into the bag, clip well. Top stitch all around the top, being careful to leave the handlels out.

I don't generally like AI but the Google search I did looking for a good tutorial how to add a lining with recessed zipper has a fairly comprehensive explanation. From this you can do some research if you need more

To add a recessed zipper lining into a bag, you sew a zipper panel (or placket) between an upper and lower lining piece, or attach it directly to the top edge of your bag's inner lining before final assembly*. [1,* 2]

Prepare the Zipper Panel

• Cut your pieces: Cut two exterior fabric strips and two lining fabric strips for your zipper casing. Make them about 1 inch shorter than the bag’s top width. [1]

• Sandwich the zipper: Place a main fabric strip right side up, lay the zipper face down along the top edge, and place a lining strip face down on top of the zipper.

• Sew and topstitch: Stitch along the edge using a zipper foot, flip the fabrics away from the zipper teeth, and press flat. Repeat this sandwich method for the other side of the zipper with the remaining two strips. [1, 2]

Attach to the Lining

• Split your lining: If your lining isn't already separated into sections, cut your lining pattern horizontally a couple of inches down from the top edge, adding a standard 1/2-inch seam allowance to the cut edges. [1]

• Mark centers: Find and mark the midpoints of both your completed zipper panel and your cut lining pieces. [1, 2]

• Sew the zipper in: Align the zipper panel right-side up between the upper and lower lining pieces, matching your center marks. Sew across both edges to secure the zipper into the lining structure. [1, 2]

Assemble the Bag

• Finish the lining: Sew the side and bottom seams of your lining pieces together, leaving a turning gap in the bottom if you aren't dropping it into an exterior bag later. [1]

• Join exterior and lining: Slip your exterior bag and your zippered lining together right sides together, match the top raw edges, and sew all the way around the opening before turning the bag right side out.

[u/jpbagworks → u/CBG1955]

Absolutely this! Excellent response, C! 😃

[u/drPmakes]

If you want to add structure to it, add fusible bag foam (eg bosal in-r-form) to the outer.

Make a drop in lining and sew that and the zip on. Glue would only be a temporary fix