Here is a nice little trick. So your on the field kicking
ass. Then all of a sadden Hsssss your cup seal goes and you don't have a
replacement. What are you going to do!! Call it a day and go home? NO!!! You
do this temp fix.

Remove the valve and cupseal.

Take a lighter and heat up the cupseal then ......

.......mesh it into the valve. Push hard and spin the
cupseal.

Once it cools down you should have a nice little indent on
the cupseal. This should stop the leak and get you through the rest of the
day. But you will need to go and recroni. Remember this is only a temp fix