Gold unstoppers the vial before doing the same with the battle. He has very steady hands and very easily fills it without spilling a drop. He is pointedly not looking at the water itself. He doesn't need to know what it is trying to remember for him or show the rest of the world.

"There's always more than you think there is," he says rather sourly, sealing the vial again.

True? perhaps. Safer to assume than not.