The inverse is "you cant". I'd suppose if a number is as random as eg 49oz, then you wouldn't find a consumer brand willing to market such a product. Since they could easily have made a 48oz or 50oz bottle?
Why go out of your way making a 31oz bottle for sale when one could have made it 32oz to increase its demand by 2x/10x/99x?
Why go out of your way making a 31oz bottle for sale when one could have made it 32oz to increase its demand by 2x/10x/99x?