@MadTinkerer Well, Funwayguy has been working on the 1.7.10 port of Enviromine. I'm not holding my breath for additional 1.6.4 changes. But minetweaker could always be used like this suggestion by @Shin Sekai.
recipes.addShapeless(<373:7>, [WaterBottle,WaterBottle,WaterBottle,WaterBottle]);
recipes.addShapeless(<5260>, [<5260:*>,<373:7>]);
373:7 is an item called "Clear Potion" from vanilla minecraft that has no potion effect and has no default crafting recipes. If you drink it, it gives you 10% hydration back like normal water bottles.
5260 is the camel pack (at least in v1.0.7 where I was testing this) and if you put an asterisk (*) for the damage value, it will let you craft that item with any damage value in the crafting recipe.