How to Manufacutre Multiple Product into Single Manufacturing Order ?

I am working for a paint manufacturing company.

Suppose I have product called "interior water-based paint” and it will have 3 variant packaging size as follows 5 KG , 20 KG and 25 KG

Currently, when i have to manufacture product i have to go to one by one variants to create manufacturing order or to create a single product and create another MO to package products.

So there are 3 variant packaging size, and i have to create at least 2 manufacturing order
That not really PRACTICAL !

Even though i create 2 or 3 manufacturing order.

When we manufacture the paint we put all ingredient into 1 super big pot,

So i have to create 3 different packaging size manufacturing order. I will have to added up all materials use in each manufacturing order, since the material use in each variants will be the same but only different in quantity.

Is there are anyway that i can manufacture multiple product in a single manufacturing order ?

MRP by product it doesn't suite my situation