Customizable Potions

I would love to see potions store their effects in an easily customizable way. If the effect itself was stored as an array of potion effects and their durations, potions would become simpler and faster for technical use. An alternative to this would be to add a custom potion effect that contains this kind of array of effects. Custom (drinkable) potions would be amazing as a directly supported thing. An example of such a command would be: /give @s potion{Effects:[{potionEffect:"minecraft:speed",duration:40s,amplify:3},{potionEffect:"minecraft:haste",duration:20s,amplify:6}] Giving the player a single potion with two different effects with different amplifiers and durations.