Milk

Your bottles mostly belong in teas. Every milky pure tea, from healing to ore to scrap, takes three of them on top of a pure tea at the Mixing Table, and the milk makes the effect last longer. So the question with each bottle is whether it stays whole.

The alternative is the fridge. Milk's own text says to store it there to separate it, which gives you cream, the base of the creamy teas that hit harder and end sooner. What is left is skimmed milk, hydrating but less calorie dense than the whole bottle. Short and strong on one side, long and steady on the other.

Think about how the tea will be used. A farmer heading out for a long loop of nodes wants a milky ore tea that lasts the whole trip. A team bracing for an online raid would rather have the stronger creamy version for a fight that is over in minutes. Decide before the milk goes into the fridge, because there is no putting it back together.

Drinking it plain is not wasted: the game calls it very calorie dense, so a bottle makes a decent emergency meal. Still, a milky pure healing tea stretches a large heal over a longer window, and few other things do that.