Foxyferret
I turn sauce bottles upside down and balance them carefully
on top of the new ones when you have used some. I do it with hand wash bottles and washing up bottles too. You get every little bit out.
I have done this at a dd’s house - after finding 2 or more large bottles of ketchup with just a little bit in the bottom. Decant into a 3rd fuller one, rinse and ditch the empty ones. Gives me pleasure to make space in her crammed pull-out larder!