I use shampoo from a large bottle with a pump. The pump can’t get the last bit out of the bottle.
I cut apart the pumps from two shampoo bottles and epoxied the caps together to make an adapter. I’m going to use it to attach the old bottle to the new bottle and drain the remainder out.
I was worried that this would be too exciting to qualify, but then I told my wife about it, and used her reaction as a guide.
I suppose your wife is more exciting than us dullards.