Tube-forming lipid transport protein which mediates the transfer of lipids between membranes at organelle contact sites (PubMed:35499567). Required for retrograde traffic of vesicle clusters in the early endocytic pathway to the Golgi complex (PubMed:20163565, PubMed:35499567). {ECO:0000269|PubMed:20163565, ECO:0000269|PubMed:35499567}. This is the function of ENSG00000111647 (BLTP3B, bridge-like lipid transfer protein family member 3B).