i started using my new 0.75 L Source collapsible bottle. ("Liquitainer").
http://www.amazon.com/Source-Outdoor...QSH00F7PCR53V9
as a water bottle and a hot bottle.
my impression so far is good.
takes few trails to get comfortable with filling it up, but its an interesting design, (more ''sophisticated'' than the platy) and seems solid, and holds hot water well.
i do add the boiling water after putting a little bit of cool water, just in case, and to hopefully extend its life.
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