What is all this nonsense about opening oil cans correctly? Why waste your money on some fancy new tool when you can simply gather up and use the already opened half empty cans that have been left in the racks of the line vans. Failing that, you could go to the zipper and grab a couple of used tins that have been rolling around in the back. A bit of water sloshing around in them won't do no harm, it's all liquid at the end of the day.