And you have Cunninghammed me :-) Some Nalgene's are polycarbonate, like those commonly drunk from. But not all, some are HDPE[0,1,2]. Some are Polypropylene

And you have Cunninghammed me :-) 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-mouth-hdpe-bottle/ https://ultralightoutdoorgear.co.uk/ultralite-1-litre-wide-m... [1] https://www.cotswoldoutdoor.com/p/nalgene-hdpe-125ml-wide-mouth-storage-bottle-E6124049.html https://www.cotswoldoutdoor.com/p/nalgene-hdpe-125ml-wide-mo... [2] https://www.elitemountainsupplies.co.uk/camping-trekking-c4/hydration-purification-c31/nalgene-c70/nalgene-medium-travel-kit-p312 https://www.elitemountainsupplies.co.uk/camping-trekking-c4/... [3] https://www.thelabwarehouse.com/products/bottle-nalgene-ppco-square-w-mouth-with-pp-screwcap-500ml https://www.thelabwarehouse.com/products/bottle-nalgene-ppco...