Using Inventory for parts with "partial" usage (less than 1 unit per work order)

Curious how folks are addressing using the inventory system to track usage of supplies that would require “less than 1 unit” per work order completed. 

Here is an example: Condensate pan/drain cleaner used on mid season mini split maintenance. I buy the bottles by the quart and always like to have at least a couple around. Issue is, might only use ¼ of a quart per mini split head. 

1. Is there a way to handle this in MaintainX

2. Or am I just over thinking this getting that granular with the tracking of inventory..