MIT Has Solved One Of Mankind's Biggest Problems!

Better Living Through Chemistry!

Alas, Heinz will never use it, because if you could get all the ketchup out of the bottle you would need to buy 10 per cent less ketchup.

Hopefully they made sure that none of the coating leaches into the product or breaks down. Then comes the problem of if it will be able to be recycled or not, I buy nothing but Heinz myself but there are others that don't seem to have much of a problem & that's one of the reasons that I prefer Heinz for the taste of their ketchup.

It'll probably be linked to cancer in 10 years as is everything these days. I buy Heinz No High Fructose...in aaaaaaaaaaaaan upside down bottle

For the most part glass ketchup bottles have disappeared from store shelves, replaced by plastic squeeze bottles, but even then there is the problem of some product left in the bottle.

Solved this one a long time ago....shake the bottle in more of a horizontal (at 45 degree angle or less) motion instead of vertical. It makes it easier for air to get in so the ketchup can pour out.

No chemistry needed just physics

Try it

Woodncoal is right though...squeeze bottles have pretty much taken over.