Ive noticed that if a mod adds a bucket with a bottled fluid while bucket transfer works perfectly fine with tank upgrades bottle transfers are completely non functional.
Ie: Create, Thirst was taken
Can lead to super strange scinarios with storage blocks/backpacks having fluid trapped inside of them

As discussed in Discord this is caused by the fact that the mods that add these don't actually make bottle into fluid containers that would be capable of handling these fluids, instead they have some kind of player interaction code or machine transformation recipe that allows changing empty bottle into bottle with fluid. So supporting this will require addition of custom fluid handlers. Unfortunate fact of those is that they need to be added for every mod that adds bottle with fluid in the same way so I may add support for some of these but probably only the most popular ones because I don't want to have way too many dependencies that would hold back ports to newer versions.