Bike-nut 4 Parktools make a large range of quality bike maintenance tools and items, and the chain lube is one of them.It comes with a tiny, thin straw for you to insert into the top (after removing the cap) and drip on to the chain or other areas of the bike that you need to lube up. It's pretty easy to use, but just becareful to not tip the whole bottle upside down when lubing your chain as the liquid from the bottle will come out at a rapid pace.What could be better: just an easier way to control the amount of lube liquid and how fast it comes out of the bottle. You could always put a cellotape on the top of the mouth of the bottle and insert a needle to make a tiny whole and it may work better for you.I bought this item with the Parktool chain cleaning gang set. :)Otherwise the liquid itself is good quality and keeps you rolling!