Thanks for the suggestion, Michael.
I’m sorry, but we won’t be able to add a new type of container for Lindr machines, as we don’t feel this is a good solution for the problem that you’re trying to solve. It also wouldn’t resolve any of the problems that pretending that a Lindr machine is a keg would have - capacities, requiring packaging from batches before selling, etc.
I’d suggest giving Equipment logging/tracking for hire, rental, loaning, leasing, etc a vote as that thread covers a great solution for what you’re looking for here.