Ketchup – Mustard
Both ketchup and mustard contain acids which act as preservatives. Because of that, they do not need to be put in your fridge. In most cases, Dijon, yellow or whole-grain mustards can end up lasting 2 months or longer in a cabinet. On the other hand, ketchup has a shelf life of about 1 month. Others will argue that ketchup can end up lasting much longer. If you and your family use mustard or ketchup frequently, then there is no need to refrigerate them. At the same time, if you feel that you may not use the bottle within that time frame, then you can place it in the fridge to last longer. Also, this decision should be based on whether or not you enjoy putting warm or room temperature ketchup or mustard on your sandwich or food.