<item id="1">
<!-- Event - Medal -->
<ingredient count="17" id="6392" />
<!-- Quick Healing Potion -->
<production count="1" id="1540" />
</item>
In brief,you need 17 Event Medals (6392) to trade for 1 Quick Healing Potion's bottle (1540) :P
Sorry for the example,i'm lazy :)
Good luck.