Metallic filter bottles. Why not?

We have been asked to design a metallic HydroPal and or a HydroPal that is made from polycarbonate so we thought it best to explain why we don’t have one...after all we are the original filtered sport bottle.

You suck !....literally

A metallic filter bottle works by relying entirely on how hard you can suck the water through the filter and its quite hard work.  For example, a HydroPal is used by squeezing the flexible plastic bottle and some even suck at the same time...the bottom line is that our lungs are not designed to suck with a lot of pressure just like they are not designed to blow up 20 party balloons until you pass out, something I am sure we have all done on many occasions. 
Our research was that filter bottles need a soft, squeezable plastic container to be easy to use by utilising the pressure created by your hand to force the water through the filter.

Don’t forget to Flush

One thing all filter bottles have in common is that if they have been standing for a day or two they need a quick flush to remove water that has been sitting within the filter.

The HydroPal is flushed with a simple squeeze of your hand and discarded but a metallic bottle needs you to suck out the water to flush it so you either swallow the stale water or you can take out the filter and run it under a tap to try and force the water through the filter...its a bit of a pain really so we have opted to stay with the soft squeezable bottle....did I mention it is 100% recyclable?