What is the best way to get cut open plastic to stick to other pieces?

I finally have more then 100 2-litter bottles, and have started to cut them open. now I have rolled up sheets of plastic. I originally thought about stapling them together, but the staples do not go thru 2 sheets of plastic. I wasted a lot of staples trying. Then I thought about model glue, since it is made for plastic, but I have not seen any in stores for years, not sure if I can still get some. Found a site that said pipe glue would work. Thinking about trying that, but I suspect I would have to clamp the pieces together to prevent the plastic from rolling-up before the glue dried, and I do not have any clamps long enough to reach the length of the plastic. Just some old C-clamps.
Answers

Speed

There's a website specifically about adhesives, ThisToThat.com. It probably can recommend not just a type but brands. I have artist friends who swear by its information.

Tommymc

Soda bottles are made from PET (polyethylene) plastic which is almost like Teflon....almost nothing sticks to it. Here are some solutions that Permabond recommends: https://www.permabond.com/materials_bonded/4508/ You didn't state what you're trying to construct, so it's hard to make recommendations. Since you mentioned staples, it may be that it doesn't matter how the bond looks...as long as it holds the sheets together. One solution would be to overlay the pieces and use a hammer and nail to punch holes. Then sew the joint together using clear fishing line or strong twine. If you do opt to use adhesives, you'll probably need to clamp the joint. You *can* use your C-clamps for this. Get a couple of wood blocks that will span the distance, and clamp them at the ends.

x-Wulfgar-x

Epoxy

Jan

try heating it with a iron, it may adhere together with heat

Aaron

Others I'd consider using are duct tape/military tape, glue gun, super glue etc

karly

Hard to get acrylic powder for nails of late