Item variations. Not to be confused with modifiers.

Modifiers do not allow for inventory control in the way that…

For example:

[Item]
Coca-Cola [Quantity] 4 total

[Modifier]
1.25ml [Quantity] 2
1.75ml [Quantity] 2

Tha order page will allow customers to order up to 4 of the same modifier.

Storekit modifiers are designed for the likes of pizza toppings and kebab customization.

Item variations, with independent stock control is needed. Take a look at square for example.

And please, no replies to say it works, I've tried and it isn't fot for purpose.