Why do I keep buying condiments I already own?

Not because you forgot you own mustard. You know you own mustard the same way you know you own a kettle — it is a fact about your kitchen you would state confidently if asked. What you do not know, standing in a shop with a jar of a slightly different mustard in your hand, is whether the one at home is a third full or nearly empty, whether it is this one or a different brand, and whether it is even still in date. That is a much narrower question than "do I own mustard," and it is exactly the one condiments make almost impossible to answer from memory.

The fridge door is a worse filing system than it looks

A fridge door holds condiments in a single dense row, shoulder to shoulder, mostly facing the same way, in bottles that are frequently the same shape regardless of brand. Reading what is actually there means pulling several bottles forward, and most people do that glance, not read — a scan for roughly-the-right-coloured lid rather than a check of what is written on each one. A pantry shelf does the same thing sideways: two mustards, a hot sauce from a restaurant, a jar of something bought for one recipe eighteen months ago, none of them facing forward, none of them at eye level for more than one of them at a time. Nothing about how condiments are normally stored makes an honest inventory of them visible at a glance, which means the fact of what you own and the ability to see what you own have quietly come apart.

The recipe-bottle trap

A specific dish calls for a specific bottle — hoisin for one stir-fry, a particular chilli oil a video told you to buy, a jar of harissa for one dinner party three years ago. You buy it, use two tablespoons, and it goes to the back of the door because nothing else you cook calls for it. Eighteen months later a different recipe wants the same thing, you check the door, do not immediately spot a bottle you half-remember from once, and buy it again — sometimes a different brand, sometimes the exact same one, standing a few centimetres behind the one already there. This is how a condiment shelf fills with singles: each bottle was a real, considered purchase for a real dish, and each one was also, quietly, a duplicate of something already sitting a few bottles back.

Why "it might be expired" makes the guess worse, not better

Unlike a spice jar, which just gets slowly weaker, a condiment sitting unused for a long stretch raises a second, separate doubt: is it even still good. That doubt does not make people check more carefully — it makes them buy without checking at all, because "get a fresh one" feels like the safer, faster call than digging out a jar with no visible date and deciding whether it still smells right. The result is a condiment shelf where the newest bottle of each thing is reliably the one in use and everything behind it is there for no better reason than that nobody wanted to make the call.

Hosting and gifting add condiments nobody chose to restock

A barbecue sauce bought for one cookout, a hostess gift of a fancy vinegar, a mustard someone left behind after a shared meal — none of these were decisions to add to your normal rotation, and none of them got weighed against what was already on the shelf, because they did not arrive through the usual "I am out of something, let me buy more" route at all. They just appear, get used once or not at all, and sit there indistinguishable from the condiments you actually restock on purpose. A shelf that looks crowded is often not evidence that you buy too much mustard — it is evidence that mustard keeps arriving by more routes than the ones you would think to check before buying more.

What actually helps, without alphabetising the fridge door

Not a labelled, uniform-bottle system — that is a project most people start once and abandon within a season, and the door goes back to whatever order things landed in. What actually closes the gap is much smaller: knowing, in the thirty seconds before a bottle goes in the cart, whether something that does the same job is already at home, and roughly how much of it is left. A short list beats trying to picture the fridge door from a shop aisle, because the thing that fails here was never your memory of what you cook with — it was your memory of exactly which bottle, how full, and whether it is worth digging to the back of the shelf to find out.

Where a note beats a tidier fridge

This is a case where being shown the truth works better than reorganising harder. Kept is built for exactly this kind of list: photograph the door or the condiment shelf in one go and let recognition draft the entries, rather than typing bottle by bottle, or say it out loud while you are standing right there with the door open. Then the next time a recipe sends you toward hoisin or hot sauce, the check-before-you-shop search answers the question that actually matters — not whether you have ever owned it, but whether the bottle about to go in the cart is the second one.