Stackable potions [PLEASE]

I don't understand why this shouldn't be a thing. Potions are basically useless because I don't have enough space to carry them. Even if they stacked, I still wouldn't have much space to carry them, and as they are, I rarely get to use them. To keep them balanced, I think having a cooldown (like the spear lunge cooldown) every time a potion is thrown or consumed, and capping it at 16 items per stack, should help.

 

Also, some potions I wish were in the game are resistance potions (ingredients could be shulker shells or armadillo scute dog armor) and decay potions (made from wither roses).