How to inventory bags
Nobody sets out to own nine bags. What actually happens is that a work bag, a gym bag, a weekend bag, an everyday bag, and a "just in case" bag each get bought once, for a specific job, on a specific day — and none of those five purchases ever feels like buying a bag in general. It feels like solving today's problem. The pile is real. It just never announces itself as a pile.
Why a bag collection hides in plain sight
Bags are not small the way jewelry is small, but they hide for a related reason: they are bought by role, not by type, so two bags that do the exact same job rarely feel like duplicates while you are buying the second one. A jacket you already own two of registers instantly, because a jacket is just a jacket. A bag bought "for the gym" and a bag bought "for the gym, but the strap is better" both feel like reasonable, separate decisions, even though they are answering the same question twice. On top of that, bags do not live in one place the way a closet's clothes do — one is on a hook by the door, one is in the car, one is on a shelf in a spare room — so there is rarely a single moment where you actually see the whole collection at once and notice how large it has gotten.
The three ways it actually piles up
A bag outlives the role it was bought for. A laptop bag from a job you no longer have, a nappy bag from the stage of parenting you are now past, a bag from a conference in a city you do not remember — the role ended, but nobody made a decision about the bag specifically, because it did not feel like it needed one. It just sat wherever it was last used.
The same role gets solved twice. An everyday bag gets replaced because the strap wore out or the style stopped feeling right, and the old one is kept "for now" instead of retired, because getting rid of a perfectly functional bag feels wasteful even when it is not being used. A year later there are three "everyday bag" candidates in rotation, and only one of them is actually being carried.
Things go missing inside a bag that is not currently in use. A pair of sunglasses, a spare charging cable, a travel-size bottle, a bit of cash in a zip pocket — these do not feel lost while the bag itself is sitting on a shelf. They only reveal themselves as missing later, when you go looking for the sunglasses specifically and have long since forgotten which bag they were last in.
Why "idle" means something different for a bag than for most things
Elsewhere in a house, months of not being touched is a fair signal that something has stopped earning its space. A travel bag or a bag kept for one specific kind of occasion breaks that rule on purpose — it can sit untouched for most of the year and still be exactly the right thing to own, the same way a passport does not need to be used weekly to be worth keeping. What idle time is actually useful for here is the everyday-role bags: the second and third "daily bag" that quietly stopped being the one you reach for, months ago, without a decision ever being made about it.
What is actually worth tracking
Not every tote or drawstring bag in the house. What is worth a short note is which role each bag you actually use is filling — everyday, work, gym, travel, occasion — so that overlap is visible at a glance instead of discovered by accident when a third bag turns up doing the same job as two already in rotation. The other thing worth a note, specifically, is anything of value left inside a bag before it goes onto a shelf or into storage for a while: a charger, a small amount of cash, a pair of sunglasses. That single line is what turns "it's probably in one of the bags somewhere" into an actual answer.
When to actually update it
Three moments cover this. Before buying a bag for a role you already have — another everyday bag, another gym bag — a quick check of what already fills that role is what catches the purchase before it happens rather than after. When a role in your life ends — a job, a stage of parenting, a trip — that is the moment to look at the bag tied to it and make an actual decision, rather than leaving it to sit on a shelf indefinitely by default. And before a bag goes into longer-term storage, a note of what is still inside it is what stops a charger or a pair of sunglasses from quietly becoming a mystery six months later. This is close to what Kept is built for: photograph a shelf of bags in one go rather than typing each one out, use the check-before-you-shop search the moment you are standing in a shop considering a bag that might already have a twin at home, and let idle-days tracking quietly flag the everyday bag that stopped being the one you actually carry — without touching the travel bag that is doing exactly its job by sitting still most of the year.
What it looks like when it works
Not a fully catalogued shelf with every drawstring bag logged. It looks like being able to say, before you buy, whether a bag for this specific job already exists somewhere in the house, and being able to open a bag that has sat on a shelf for six months without wondering what you might find zipped into a side pocket.