The bottles aren’t really a weapon as such, but act as a tool used for distracting this colossal zombie-like creature.
Simply put, he’s one nasty piece of work! Distracting Jeffīottles play a crucial part in Chapter 7 ‘Jeff’. He’s a formidable enemy who is completely blind, but has super hearing and a very good sense of smell… and don’t even think about using your weapons on him, you’ll just be wasting precious ammo, as he’s bullet-proof! He's not a pretty chap, Jeff has four large growths on his back that spurt out Xen spores. In Half-Life: Alyx, Jeff lives in and patrols the distillery, protecting his territory from trespassers.
