Good quality, suitable for Lambrettas and Vespas that have to pre-mix their oil.
 
These have the increments to measure the percentage of oil per litre up to 5 litres at both 2% and 3%. Obviously, if you are running at 4%, you need to double the amount at 2% of oil added.

These are approximately the same height as the 2% jugs, but wider (see 2nd picture).