I've built a custom potion. Its texture is 32x32, so it appeared too large in my hand, so I followed a tutorial on how to render it with an attachable and an animation.
However, that approach doesn't play a first-person animation. So I then attempted to find the first-person animation for consuming/eating/drinking and couldn't find the vanilla animation. Finally attempting to create my own first person animation to add to the attachable.
Blockbench does not seem to support this. Any help?