One bad thing about the GI cans: They have a large opening, with a screw on cap, and a smaller opening with a threaded cap in the middle of the large one. But they do not make a screw on spout for the small one, and it is a goofy size/thread, so I haven't be able to find one anywhere. I juryrigged a spout with some of the clear flexible PVC tubing you can get at any hardware store and a hose clamp. Without a spout it is very difficult to pour water into smaller containers (or your radiator) without spilling a lot...