Have you heard of "marrying ketchup bottles"? I use to have to do that, not only with ketchup bottles, but the mustard and steak sauces too. When Ken Hayes and I started having this conversation we realized that it's been awhile since we've seen a glass ketchup bottle.
As the resident "foodie" (okay - they really call me a "food snob", but somehow "foodie" sounds better...), I found the following article especially interesting; It helps to solve the age-old debates Where should you store your condiments...