No issue for me opening and closing. The one thing to pay attention to is that it is fully closed so that it doesn't leak when tipping to fill equipment.
The 5 gallon cans not have the see-through strip. However, they have enough transparency you can usually make out the gas level, and of course you can lift them up to get an idea how much gas they contain.
Can is delivered empty.
We sell the yellow, some stores may carry the blue.
Can you lift and hold 40 plus pounds of liquid with one hand? If yes, you are at least partially qualified.
The overview says no, but as a second opinion you'll probably try anyway. Just show us on video how it worked for you.
Actually, if you read the description it clearly states it is not to be used to refill on road vehicles, I would assume this means motor vehicles.
No I ordered mine from Home Depot and picked up in store free