No worries with this mate..your active ingredient cristallized..if you heat it back which you have done it should be okay agaian..just make sure you dont see any cristals left..
D.W.
My advice would be (since you are willing to take the risk) to buy glass amps and smuggle these in your undies..i am not sure if the metal lids will set off the alarms but would not take that extra risk..
PS we have a TV show in Holland (Austalia Border Patrol) and they are &## TOUGH!
Bro, i have seen them without ring, with the green ring and white ring..all were good, but definately need a clear pic of your niles to judge if theyre okay or not