Wow, you really hit one of my sore points. I have some older gas cans left but they are becoming unserviceable. The newer cans (I guess that is CARB-compliant?) are complete crap. I assume the intent is to prevent spillage, but every CARB can I have spills gas everywhere if used as designed. I've done as suggested by others here with improvised funnels, and usually pour from the new cans into the old as I use the gas to prevent cursing. One of my applications is to fill my motorcycles and that is a complete nightmare with gas splashing all over the tanks. Again, if the intent of CARB is to prevent spillage and emissions it has accomplished exactly the opposite.