Dedicated oil transfer containers are the best tool for small volume transfers of oil to machines. Containers should be made of a durable plastic material and have a lid that seals completely for the most basic contamination control.
For best practices contamination control, look for the following features in an oil transfer container:
Desiccant or non-desiccant breather to control particulate and moisture contamination
Quick connects on the lid allowing oil to be added without opening it to the atmosphere
Container color-coding options and labeling system