I cut up plastic mesh. I get it from joanns or michaels. I slip it in the bottom between lining and outside fabric. It's inexpensive about a dollar for
Big sheet

Timtex.

When making a sleeve for the insert at the bottom of the purse or tote, add a pocket (or any length)using a zipper closure, or hook and loop. Then put the pocket facing the bottom of the bag and you have a secret pocket. My mom had a purse like this that I thought was a neat idea.

I have used both but the foam board will bend if mishandled. I sleeve the foam board so it is removable for washing.

Plastic canvas or a very very stiff Pellon craft fusible.

I've used corrugated plastic, but can't seem to find anymore in my neck of the woods. Those who use it, where do you get your supply?

But I usually collect political signs after the election. They are free, very light weight and very durable!

I get those cheap plastic cutting mats at dollar stores and use them for large totes and making quilt templates.

This works the best for me as well.

The hardware stores sell a tool that has a hook shape for cutting plexi. (It really scores the plexi so you can snap a piece off) I use plexi when I can get it cheap. Ask what they do with the scratched stuff as most people want it in good condition. A local place will let me pick from the scrap bin.

piney