Have you ever been frustrated by pouring fluid from a can with a spout only to have it dump all over the top? Have you ever had to add oil to your car and not had a funnel? Great news, now you can do both with a simple tip.
Your car first... Pull the dip stick partially out of the tube leaving a couple of inches in the fill tube, hold the can of oil touching the top end of the dip stick. Pour. As if by magic, the oil will stick to the dipstick and follow it straight into the fill tube.
To do the same thing with those chemical containers, I use a wooden grilling skewer. Touch the one end to the container spout and hold the other over my receptacle. The fluid will flow down the stick into the container below.