Most Nalgene bottles are designed to be able to stand up to boiling water.
Today, many hikers and others recognize the distinctive appearance of Nalgene-branded bottles. Its laboratory pedigree is still suggested by the markings, in hundreds of millilitres, of the volume contained. The materials resist stains and odors absorption, and can be filled with boiling water.
Screw-in filters, which allow the user to add coffee grounds or tea, pour boiling water over the contents, seal the lid, and brew the beverage.
Another widely available Nalgene Outdoor product is a 650 ml (22 fl oz) "All-Terrain" or "bike" bottle. The bottle itself is made from low-density polyethylene (LDPE), and its screw top has two moving parts: a drinking nozzle that seals until snapped open by pulling on it, and a hinged Lexan dome, that when closed both snaps the nozzle closed and protects the nozzle against contamination. Unlike traditional Nalgene containers, this item can be damaged and potentially ruined by filling it with very hot water.
It is true that Nalgene bottles used to have BPA, but Nalgene phased out those products in 2008.
On the same date, Nalgene announced it would phase out production of its Outdoor line of polycarbonate containers containing the chemical bisphenol A (BPA). Nalgene subsequently adopted Tritan, a BPA-free copolyester made by Eastman Chemical, as a substitute.
and at the same time it looks like even the non BPA free bottles did not leach significant amounts of BPA.
Hundreds of studies have been conducted since this time and have shown that
under normal use conditions (anywhere from freezing to a hot day), BPA does not
leach from the polycarbonatein detectable amounts.
This confirms other studies that show BPA does not
leach from polycarbonateplastic in doses that will
cause harm, even under the most extreme conditions