Have you tried frozen marshmallow as an alternate for ice packs for baby’s use?

I haven't personally used it on my kids (mashmellows don't last in our household) but my sister and I used to freeze our mashmellows before having them. They don't totally freeze and don't hold much cold so I can see how it would be pretty handy if baby gets a boo-boo! Plus, you can eat it afterwards lol