I know this will seem stupidly simple once someone explains, but my brain has been struggling for a minute and I was obviously impressed by this because it’s a screenshot of an advert that’s been sitting on my phone since forever.

  • @[email protected]English
    6•1 year ago

    If the 4L can be poured somewhere else, it gets even easier:

    • fill 5L can
    • pour from 5L into 3L. 5L now has 2L left. Pour that somewhere.
    • repeat above once more to add another 2L.