Review on ⚙️ ValvoMax Disposable Funnel 8 oz: Clean, Safe & Fast - Pack of 12 for Hassle-free Pouring! by Adam Wilson

So far these little funnels have worked well for me. I have used 1 funnel to do 4 oil changes on our cars over the weekend while we had a nice break in the weather. You need to hold it while you add oil. Being small and square rather than round it won't just sit there and you won't be able to inflate a full liter in 2 seconds but as long as you're careful no problem. Because I'm disposable, I don't have to worry about cleaning my existing plastic funnel, cross-contaminating liquids, or dirt I missed in my funnel because it got into our engines. Because they are flat they are very easy to store in my garage closet. So far no complaints.