Precision Fluid Pipette

Precision Fluid Pipette is a tiny, focused mod that adds one item: a glass pipette for handling fluids with the precision a bucket can't offer. Where a bucket forces you to deal in fixed 1000 mB increments, the pipette stores any amount from 1 mB up to 1000 mB, making it perfect for topping up tanks, draining the last few drops out of a machine, or moving partial amounts between systems without spilling or wasting anything.

It's a manual tool — no automation, no pipes, no networks. Just one well-behaved item that does five things well.

What the pipette can do

The pipette combines several roles you might otherwise need separate tools for:

Precision extractor. Pull fluid out of any compatible tank, machine, or storage block — including partial amounts. If you only need 250 mB of lubricant, you only take 250 mB.
Precision inserter. Put the stored fluid back into a target tank, in any amount up to whatever the target accepts.
Pickup bucket. Take a water, lava, or modded fluid source straight from the world, just like a bucket, when the pipette is empty.
Pour bucket. When the pipette is full, place the stored fluid back into the world as a fluid block — same UX as a vanilla bucket.
Quick empty. Discard the contents in one keystroke when you change your mind about what's stored.

Controls

Input	Action
Right-click a tank or fluid-handling machine	Extract fluid into the pipette (up to free space)
Right-click a fluid source block (water, lava, mod fluids)	Pick it up like a bucket — requires the pipette to be empty, fills to 1000 mB and removes the source
Right-click any block with a full pipette	Pour the stored fluid into the world as a placed block on the clicked face — only works with fluids that have a flowing block form
Left-click a tank or fluid-handling machine	Insert the stored fluid back into the target's tank
Shift + Left-click any block	Empty the pipette completely (discards the stored fluid)

Crafting

Visual feedback

A fill bar appears on the item icon when the pipette holds any amount, so you can glance and tell how full it is.
The tooltip shows the contained fluid and the exact amount in millibuckets, or "Empty" with the capacity when no fluid is stored.
Status messages confirm each action (extracted, inserted, poured, emptied, target full, cannot mix, cannot pour, etc.) — translated into English and Russian.

Compatibility

The pipette uses the standard fluid handler capability provided by Forge and NeoForge. That means it works with any tank, machine, or fluid-storing block from other mods that exposes the standard capability — no mod-specific dependencies, no hardcoded integrations. Tested with vanilla water and lava; designed to behave the same way with modded fluids that follow the standard convention.

Its registry namespace is precision_fluid_pipette, so it does not collide with mods that already add their own pipette item (such as Mekanism's Pipette).

Why use it instead of a bucket

Partial transfers — buckets are all-or-nothing; the pipette handles single-mB precision.
One slot, one tool — no need for separate buckets per fluid; the pipette holds whatever you put in it.
All bucket interactions still work — pick up sources, pour into the world, empty on demand.
Lightweight — adds a single item, no extra recipes beyond the pipette itself, no config files, no network packets beyond what the fluid capability needs.

Versions

Available for both loaders on both Minecraft versions:

NeoForge 1.21.1 (21.1.0 or newer) — Java 21
Forge 1.21.1 (52.x or newer) — Java 21
NeoForge 1.20.1 (47.1.x or newer) — Java 17
Forge 1.20.1 (47.x or newer) — Java 17

Pick the file that matches your Minecraft version and mod loader.