I was given a catering size can of pulped tomatoes, so decided to make ketchup, using a tried and tested recipe. All went well and I found plenty of containers to store it in. The problem came a couple of months later when I opened one of the large bottles to fill up the table bottle. The contents exploded all over the kitchen, the benches, the floor, the walls and up the curtains, not to mention myself. I was supposed to store the large bottles in the fridge to stop them fermenting!