0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)
   1.18.2 Forge 7.1.32 [verified color issue is still present in current source code]

1. Describe the bug
   Tinker's Construct potion fluid shows up pink colored in GUI, and Traveler's Backpack potion fluid is just called "Potion" in other mods' tanks.

2. Write steps to reproduce the bug
   Place Tinkers Construct potion fluid [obtained by clicking a bottle on any tinkers construct tank] in a backpack. Backpack GUI [both HUD and inventory] will show it as the default color of the uncraftable potion.

Place Traveler's Backpack potion fluid in e.g. a Tinkers Construct Smeltery. Hovering over it will just say "Potion"

This issue almost certainly applies to other mods as well, I simply haven't tested with the others [Thermal, Create, and Immersive Engineering all add potion fluids, and Industrial Foregoing has ore processing fluids that are likely to have the same color issue]

4. What is expected behaviour
   Color should match color of the potion. Call the stack sensitive getColor method - for some reason you only call it when the fluid is your potion fluid instead of in all cases.
   Name should match name of the potion. Override the stack sensitive getDescription method.

[Note: This issue is not about not being able to drink the other mods' potion fluids, which may be too complex to implement. Just displaying colors and names correctly]

I can't find stack sensitive getColor method

sorry, I was referring to IClientFluidTypeExtensions.getTintColor - I remembered the name of the method incorrectly

Fixed
https://legacy.curseforge.com/minecraft/mc-mods/travelers-backpack/files
https://modrinth.com/mod/travelersbackpack/versions

could you record a video of the issue?

oh okay I see now nevermind