An interesting and slightly unusual mod called EverPotion for version 1.16.3, with which players can use the cooldown effects of different potions.
EverPotion Mod for Minecraft 1.16.3/1.16.2
You choose these potions yourself. The sequence should be as follows: download this modification for yourself and only then you will carefully read, study and then use all the useful points. You will need to unlock three slots in advance. They are designed to contain certain kernels. Use two combination modes: R and Shift + R.
Download Link: EverPotion_1.16.3_2.1.2