Describe the bug:
When right clicking a Tinkers Construct Seared/Scorched Tank which has been placed in the world, or a drain connected to a Smeltery or Foundry, the held bucket's contents are dumped into it, and an empty bucket is returned. For the Spring Water and Dimensional Tears Buckets, however, while the fluid is correctly dumped into the tank, an empty bucket is not returned, thus destroying the bucket.

Additionally, while most fluids can be inserted into tanks from the inventory by right clicking them with a bucket, the same cannot be done with the Spring Water and Dimensional Tears Buckets.

Versions:
Minecraft version: 1.20.1
Spelunkery version: 0.3.16
Moonlight Lib version: 2.13.71
Forge version: 47.3.33

Other mods:
Mantle 1.11.44
Tinkers' Construct 3.9.2.34

Logs:
Even if the game does not crash they may be useful!
Please provide the following logs:
From .minecraft/logs : "latest.log" as well as "debug.log" if it exists. From .minecraft : "launcher_log" as well as a
file that starts with "hs_err" if it exists. Note: Double check that the logs are from the correct time. ex, don't give
us a log from a month ago because you forgot to check the date.
latest.log
debug.log
I cannot provide a launcher_log as I did not use the vanilla launcher to start the game.

To Reproduce:
Steps to reproduce the behavior. Format it as a numbered list of steps.

1. Load into the world
2. Place down an empty Tinkers Construct Seared Fuel Tank, Seared Fuel Gauge, Scorched Fuel Tank, or Scorched Fuel Gauge. Alternatively, construct an entire Smeltery or Foundry with at least one drain.
3. Right click on the tank (or the Smeltery drain if you constructed an entire Smeltery) while holding a Bucket of Spring Water or Bucket of Dimensional Tears. While the fluid will be inserted, the bucket will be destroyed.

Expected behavior:
This process should return an empty bucket, like what all vanilla and Tinkers Construct fluids do.

Screenshots:
This video showcases the aforementioned interactions between Spelunkery's fluid buckets and Tinkers Construct's tanks, with Tinkers Construct Molten Iron for comparison.

I recently reported a similar issue to another mod. Problem is when you extend BucketItem, your new item isn't a forge fluid container. So what I do is I fall back to the fish bucket draining code. But you also don't set a container item, so you get nothing.

There are two fixes needed here: set your container item for your buckets to iron buckets, and fix the capability handler so your buckets expose a fluid item capability to other mods. Should be a simple 1 liner as you can reuse the forge bucket handler; check BucketItem for the code you need.