Those Platypus' guys are pretty smart !
Big Zip 1 = liter
Big Zip 3 = liters
Big Zip 4 = 4 liters ...
Neat, simple, explicite ... <img src="/images/graemlins/cool.gif" alt="" />

Maxpedition OTOH is more complex :
M1 pouch = medium
M2 pouch = small
M4 pouch = large
<img src="/images/graemlins/confused.gif" alt="" /> <img src="/images/graemlins/confused.gif" alt="" />


<img src="/images/graemlins/grin.gif" alt="" /> <img src="/images/graemlins/grin.gif" alt="" />