In addition to my regular US booklet passport that I store in a safe place, I bought and carry in my wallet a passport card which I present when a government-issued picture ID is required.
My current one is a few years into its ten year lifespan- but has started to delaminate.
When I spoke to a State Department droid about getting it replaced, she said I had to apply- and pay- for a new one as that was the only available remedy for a damaged passport. I said that it was clearly defective (on them) rather than damaged (on me) but that argument fell on deaf, bureaucratic, unionized ears. Requests to escalate the issue got nowhere.
Laminated cards are produced in a heated laminating press which softens and joins the upper and lower plastic together- so I thought I'd try covering the passport with a clean pillow case, setting my wife's clothes iron to low and giving it a few passes.
Yup, good as new...