My father called it a Dopp kit when I was growing up, so that’s what I always called it. The airlines used to be decent enough to give you a basic toiletries kit (toothbrush, toothpaste, comb, sewing kit, etc.) when they lost your luggage, so I accumulated several of them when I traveled.
We called it a “drop kit.” I used to use it when traveling for my toothbrush and razor, etc. Nowadays I just use a baggie, especially since I don’t shave.
I still have one. I call it by that name because that’s what my parents called it.
I’d never seen it written down, and always assumed that it was spelled (and pronounced) “dob kit.”
I know the term and have seen it used more and more but I primarily called it a shaving bag or toiletry bag. The one I’m using was given to me by my parents when I joined the military 30 years ago and I have always had it packed and ready to go for deployments. At some point I may go all fancy and buy one of these.
I keep duplicates in the overnight kit. I have a packed pill minder in it, and when I’m nearly done with a tube of something, it goes in the overnight kit, and i start the new tube for daily use.
I used to travel enough that the pills and stuff were always fresh enough, but it’s been sitting for more than a year, now, and I should probably toss some and refresh them.
I have no word or phrase in my lexicon with which to describe this collection of things. Between half-remembered camping trips as a child and vacations as an adult, it strikes me as perfectly natural that one would put their “bathroom needs” - razor, soap, shampoo, antiperspirant, pills, toothbrush, assorted ointments, etc. - in a ziploc bag to keep them separate from the rest of one’s luggage and therefore easy to find, but I have never been aware of a particular term to describe that container.
I’d probably call it a bathroom bag if I had to think of anything to call it.
I don’t remember when I first heard the term, but that’s what I’ve always called it. I keep basic toiletries and a supply of OTC medications (which I trade out as necessary) in it. When packing for a trip I put the daily medication holders I’ll need for the duration of the trip in it. When I get to the hotel, it’s convenient to just put the whole kit in the bathroom rather than have to move a bunch of small bags and bottles.
Count me as another one whose dad used the term.
Me, I usually just call it “bag with my personal stuff”, although I usually wrap/tie it up in an extra large bandana when I travel.
My dad (who had been born in 1923) always called it a Dopp kit and I think he gave me one when I was a teenager. Later I discovered that there were much better ways to pack your stuff than to throw them in a bag with one big compartment.
I"ve never heard the term Dopp kit for what I’d call a night case.
After years and years of travel I discovered the exact opposite. I used to use a very nice LL Bean hanging travel kit, with netting and compartments for everything. Grew to hate it. Was hard to pack, hard to hang in a usual hotel bathroom and overall inferior to the nice leather Dopp my wife got me from Duluth Trading. It packs easier, fits anywhere on a counter and holds a ton.
I’m 57 and have always called it a Dopp kit, because that’s what Dad and Grandpa called it. It’s the place you keep your styptic pencils (I had to look up if these were still a thing).
I have a very nice leather one that I had got because I had a gift certificate to some fancy store and that was the only practical thing they had.
Of course, my Dopp kit is now a gallon-sized ziplock bag, which is also much easier to flatten out to fit into the carry-on bag.
I still have a couple of styptic pencils but I can’t remember the last time I used one. Since the introduction of the Trac II I find that I almost never get nicked enough to need treatment. Before that, using a “safety razor” was a different story. When I was a kid I remember my dad getting a nick and sticking bits of toilet paper on his face.
That’s another good old one I hadn’t thought about in a while. Was never much of a shaver, but always kept a few styptic pencils around for when a dog got a bit squirmy at toenail clipping time. 
Handy for so many small bleeds. I looked for one online a few years ago and all I could find was powder. Imma look again.
I wonder if “Dopp kit” was a regionalism? I say “was” because it sounds like a term belonging to a time gone by.
Anyway, the term is unknown in the New Orleans area excepting maybe folks who learned it in the military or grew up in another part of the country.
Literally never heard the term until I read the thread title.
I do have a shaving kit though considering the amount I’m currently traveling. Posting live from Korea at the moment.
Same here. Then I read the term in a Stephen King book (Later) this morning. So, I’m assuming I must have heard it a bunch of times and it never stuck.
Never heard the term. We usually refer to them as a Sundry Kit.
I’ve never heard the term “Dopp kit” before. (I grew up in Ohio.) If I had to guess, it’d be the small equipment package you install in a car to detect police radar transmitters.