bedrock-samples/resource_pack/textures/items/potion_bottle_splash_slowFall.texture_set.json

{
    "format_version": "1.21.30",
    "minecraft:texture_set": {
        "color": "potion_bottle_splash_slowFall",
        "metalness_emissive_roughness_subsurface": "potion_bottle_splash_slowFall_mers"
    }
}