Wouldn't be surprised if pumps are used at the dealers. Made use of more often than you think for in and out. Recently read the small print on the service paperwork for a couple of our Ford commercials and they use pumps to remove the old oil and leave the filters in place!
I've done numerous fluid changes (oil, transmission, coolant, PAS) on the GS and V70 recently and I'd be a bit wary of the upended 1 litre container. If it starts to overflow the thread you're in for a world of mess!