340g Bottle Ketchup Bostwick 6-9cm Pure Tomato Sweet Sour Sauce Product Overview Behind a burger counter, consistency decides whether a ketchup works. This 340g bottle is controlled to a Bostwick reading of 6-9cm per 30 seconds: fluid enough to squeeze freely from the bottle, thick enough to cling to a bun without soaking the wrapper. The recipe is a plain tomato ketchup with no added flavouring or colour, so the sauce supports the burger rather than competing with it. Every