Originally Posted By lori

Vac Seal bags are nylon with a PET (good ol' Polyethyline) lining. They stand up to boiling in the bag quite well - I sometimes crack eggs into one sized to the pot I'm taking, and boil the bag over my alcohol stove to cook the eggs. You can't let the bag touch the side above water, it melts of course.

PET is everywhere, and it's not going anywhere. All the GSI bowls, and a lot of the utensils and vessels you find for camping, are also PET.


For the record PET is polyethylene terephthalate aka polyester. This is the stuff of which plastic soda bottles and cheep suits are made. Polyethylene which comes in low, medium, and high density, is in things like the translucent nalgene bottles and the inside layer of Platypus bags.