Quick heads-up: in 'Old School RuneScape' a standard super restore potion comes as a four-dose vial. It’s shown in-game as super restore(4), and each sip takes away one dose, going super restore(3), (2), and (1) before leaving you with an empty vial.
I tend to think of them like a little emergency kit — each full potion gives you four uses, which is handy when you’re tanking a boss or swapping between brews and restores. They’re especially clutch after using a Saradomin brew because the brew raises defence and heals hitpoints but lowers other combat stats; a couple of sips of a super restore will get those stats back to fighting shape. I always keep a stack of them in my bank, and the four-dose format makes inventory planning much easier. Feels good to know exactly how many saves you’ve got left.