When I was a kid, we got to use some breakaway sugar glass prop bottles in a drama club play once, and I remember it as being so fun! We had to be careful because the bottles are expensive, but here’s a tutorial for making your own with a silicone mold and some sugar and corn syrup. Documentatian nelson8815 is right, they make a really satisfying shattering noise when you break them over something (or someone).