Sometimes the most creative ideas are the wrong ideas. Open top-up containers like this are magnets for contaminants and can wreak havoc when used on small sumps.
This is an oil top-up container made from an old coffee can, hose clamps and copper tubing. Creative, but probably disastrous to lubricated machinery.
Consider using a convenient “one-shot” or top-up container. Some oil suppliers can deliver labeled containers filled with prefiltered oil that meets a specified cleanliness level. These disposable containers are convenient, reduce contamination, minimize product mixing and increase the likelihood of proper application (correct oil in the machine).
A Better Alternative Oil Container
An alternative storage solution is to buy clean plastic jugs to fill and label yourself. Some containers have a built-in spigot and don’t require a funnel for use. Funnels, like open top-up containers, are magnets for contaminants.