Hmm, In the kitchen the only time I am concerned about air in something is making pickles or canning something. Then I just run a chop stick around inside the jar to work out any possible air bubbles before sealing.
It has slots on the side to allow air to flow out as oil flows in.
Anyone know of funnels for the kitchen with this feature?
For returning used frying oil to the container, I use something similar. I've never looked into whether or not the plastic is suitable for food use. Do you suppose these auto type funnels have some harmful chemicals in the plastic that might get into the oil ?
I have an old set of aluminum funnels that have these slots. I have no idea where I got them, they must be close to 40 years old. They do help with things pouring through the funnel quickly. I haven't seen them in the stores for a long time.