"Unique to each Jaeger. Mechanics know about it but keep quiet since it's kind of a tradition now. There's a bit of piping that's just there as insulation between the fuel lines and the coolant system and the neural gel. You install a cache there and make a mash with- well whatever you and your partner like. You a bourbon man or a gin man? ANyway. You put that in the still and don't touch it till you've been through three drops. Take it out and sure a little of the coolant's probably gotten piped in and a little of the neural gel but it's good." He taps the empty flask already on the bed. "Kinda helps the ghost drifting along, probably. Some people even bleed into the canister before they install it."