Tsa 3-1-1 Toiletries: The Minimalist Version
The bag I confiscated from myself at PHL
I used to be a 3-1-1 rebel. Quart bag stuffed like a Christmas stocking, shampoo bottle definitely over 100ml but "mostly empty," that kind of denial. TSA at Philadelphia pulled my bag for a second look often enough that I started keeping a mental leaderboard of which checkpoints actually cared. (PHL cares. Charlotte, weirdly, does not.) Eventually I got tired of standing there refolding a quart bag while a line of annoyed businesspeople watched, so I rebuilt my whole toiletry kit around doing less, not packing smarter. Less is the smarter.
Here's what that actually looks like once you've spent a couple years tweaking it.
The one-bottle experiment
I tried to get down to a single 3oz bottle for a nine-day trip. It failed, but not for the reason you'd think — the bottle was fine, it was the pump. Refillable pump bottles leak under cabin pressure if you don't lock the nozzle, and I learned this over a white t-shirt in seat 14C somewhere over Nebraska. Twist-cap bottles, boring as they are, just don't do that. I now travel with three: shampoo, face wash, one "everything else" bottle for whatever hotel toiletry I forgot to bring. That's the whole liquids kit.
Solid bars solved more than I expected
Shampoo bars and solid deodorant sound like a crunchy Portland thing until you realize they don't count toward your quart bag at all. I switched about two years ago and it cut my liquids down to almost nothing — face wash and contact solution, really. The bar sits in a little tin, no leak risk, no confiscation risk, and TSA has never once asked about it. My wife thinks the bar makes my hair look like straw. I don't think that's related, but I mention it because she'll read this.
The quart bag question nobody answers honestly
Does it actually need to be the exact Ziploc quart bag? No. Any clear zip-top bag under a quart works, and agents mostly eyeball it. I've used a clear zip pouch from a Level8 carry-on's front pocket for over a year now because it's the right size and has a little loop for hanging on a hotel towel bar, which the case's build makes more useful than it sounds — small thing, but I use it every trip.
Where I actually keep the kit now
I stopped using a hanging toiletry bag entirely. Too much bulk for what I carry now. Instead everything lives in the clear quart bag, full stop, dropped straight into the front organizer pocket of whatever carry-on I'm running that month. No separate pouch, no zippered dop kit taking up cubic inches I'd rather give to a spare shirt. This is the part where onebaggers usually tell you their exact packing cube brand, but honestly the win here isn't the container. It's deleting a container.

The stuff I don't bring anymore
Nail clippers (checked bag only, after security took mine away on a Denver layover). Full-size deodorant, pointless, solid or stick minis exist. A toothbrush case — my toothbrush just rides loose in the bag now, bristles up, and nothing bad has happened. Razor: I bring the razor but not the shaving cream, because bar soap works and one less bottle is one less bottle.
A note on the eye drops fight
If you wear contacts, know this now: saline solution and eye drops are liquids too, and agents at some checkpoints will make you pull them out separately even from the quart bag. Newark did this to me twice in one month. I don't have a fix for it. It's just a thing that happens and you should budget the extra ninety seconds instead of getting annoyed at the guy checking bags for a living.

What actually breaks the minimalist plan
Weight, mostly, if you're picky about your carry-on. A coworker of mine swears by a front-pocket carry-on that reviewers keep calling "twice as heavy empty" as her old bag, she's got MS and the extra ounces genuinely matter to her day, not just a nitpick. I don't have that constraint, so I don't feel the pocket weight the same way, but it's real for some people, so weigh that factor before grabbing a bag specifically to hold a tiny toiletry kit.
Where I landed
Three bottles, one bar, no dop kit, no drama. It took about four trips of trial and error to get here, and I still occasionally get flagged for the eye drops. That's fine. The bag is lighter, the checkpoint line moves faster, and I haven't refolded a Christmas-stocking quart bag in front of a stranger in over a year.
