This would be a nice way to store potions. My idea is for a block that lets you store a potion, like Night Vision. The value of the potion would depend on its type; for example, Night Vision for 3:00 minutes could have 40 points, while Night Vision for 8:00 minutes might have 120 points. The same concept would apply to potions with different intensities, such as Speed I or Speed II. The block could resemble a cauldron or a round flask.