I use water on the field. I combine that with the cliff shot Margarita blocks to replace sodium and get a bit of flavor into my system.
After hours I use the Nuun actjve hydration tabs.
I combine this with a normal healthy diet but not a fanatical one.
Out on the local fields there will be game days topping out at 40c and it's usually over 35c so dehydration or hyponatremia are both possible situations. I have spent years cycling in unpleasant conditions and sweating buckets so I have a good idea of what I need to do to maintain balance.
Airsoft, where nothing is hurt but feelings.