It's better if you do it with the fuel pipe coming from a tank. To diesel pump.
Take that input line and place it inside the bottle and fill that bottle with the mixture. Or diesel purge only.
Remember input line and return fuel line should both be placed inside the container or bottle you are using like this you will feed the pump with purge and slightly rev the engine like 2-3k rpm again n again then leave it idle for sometime. Repeat until whole purge diesel mixture is done