***That’s why you put your tannerite in a plastic jug or cardboard tube***
Cardboard. Plastic can be shrapnel, too.
Plastic milk jug or half liter water bottle has low mass,won’t be dangerous at any distance.Note that tannerite says 100 yards per pound.
Yep. E.g., here are a couple of dry ice bombs videoed at 62,000 fps:
https://www.youtube.com/watch?v=t6X0HTOKC24
It's weird to watch in slow motion. The explosion appears to have two stages. First the bomb bursts, then the shattered pieces of plastic go flying off.