I use them for everything from feeding bloodworms to dispensing medication. Very useful to have on hand!
These are handy to dose meds or conditioners as well as to use filling liquid test kit vials. I like that they can be purchased individually.
The only negative thing I can say is that I wish the markings were painted black because they are hard to see. ( I painted it. )
Everything else. Flawless.
I believe I ordered a few of these to get me over a threshold for free shipping. They have been super helpful and I wish I had ordered some sooner. I use them to fill up my API test tubes with aquarium water. Much easier than sticking the vial in the tank and trying to get just the right amount of water in it. Would also be handy for measuring water conditioner or meds.
These little gems make working with large bottles of chess so much easier and prevents alot of spillage.