I’m delighted to announce a new feature that should help with the automatic calculation of delivery charges 
About two weeks ago, we launched:
This uses the concept of “Units” to provide normalisation of quantities across container types. Following this, we’ve expanded the use of Units, so they can now be used as an alternative to weights and order values when defining delivery charge structures.
There’s still going to be room for further improvement here with more complex rules, but this should be a good step for lots of breweries.
For more information, please see What are "Units" and how can they be used for price book discounts, MOQs & delivery charges
@nick-colaccino and @lara-dyus from what you’ve said, I think this will cover what you need, but please do let me know if this doesn’t cover what you need 
Thank you!