1.6L is poured into the 1 1L bottle, and 6L is filled, leaving 1L.

2. Empty the big bottle, pour in 1L, then pour in the small bottle, and then pour in another bottle. At this time, there is 2L left in the small bottle.

3. Empty the big bottle, pour 2L into it, and then fill the small bottle. At this time, 2+6=8L.