This is exactly what dyneema is only with hdpe.
Guess I've got some googling to do.
PE = polyethylene. The most popular plastic on this planet.
HDPE = high-density polyethylene. One of the most common plastics. Milk jugs, glue bottles, etc.
Stick some UHMW tape on anything that needs to slide easier. Its surface is quite slippery
all the polyethylenes are relatively inert, because polyethylenes are in some sense just heavy paraffins. paraffin is germanized latin for 'relatively inert'
Some Nalgene's are polycarbonate, like those commonly drunk from. But not all, some are HDPE[0,1,2].
Some are Polypropylene co-polymer[3] but those are more for specialist things I guess.
[0] https://ultralightoutdoorgear.co.uk/ultralite-1-litre-wide-m... [1] https://www.cotswoldoutdoor.com/p/nalgene-hdpe-125ml-wide-mo... [2] https://www.elitemountainsupplies.co.uk/camping-trekking-c4/... [3] https://www.thelabwarehouse.com/products/bottle-nalgene-ppco...