This funnel is perfect for your needs. Not too thick plastic. Inexpensive product and does its job perfectly. I use it to change the oil in my Cat pump and it helps.
Lisle 19802 Threaded Oil/Transmission Funnel: Hassle-Free Pouring and Precision Funneling
9 Review
π° Efficient Filling Funnel for EPAuto Radiator Coolant System
9 Review
Engine oil Lukoil GENESIS ARMORTECH 5W-40, SN/CF, synthetic 4l (3148675)original
75 Review
π§ Lisle 19612 Multi-Application Oil Funnel (19912): Simplify Oil Changes with Ease!
9 Review