Maybe the iron skillets. I don't think a day passes that I don't use those. Or my house, it's from the 1940s. Some of the furniture is older than that too, though I don't think there is any one piece I actively use each day.

Truly oldest? Double entry accounting, I use nearly every day and that's from around 1300.

Probably my Ron Jon Surf shop beach towel I got while on holiday in Florida in 1997 (I live in the UK). Still in great condition and I wouldn't say I've looked after it particularly.

Also honourable mention to my oldest tech which is an HP touchsmart 600 PC I use for youtube in my bedroom, it's from 2011 and still just about hanging on.

I have a washcloth I got when I was like 6.. I’m almost 40. It’s a really nice mesh washcloth and somehow it only has one extra hole that shouldn’t be there, as well as a seam for the edging that needs to be fixed.

I’ve used it almost daily for my face that whole time.

But the oldest thing I have that I sort of technically use is a wheelchair from WWI. It functions as a chair in my living room. I don’t really think it counts, being furniture, though.

I have a Razer mousepad that I've used for probably 15 years now.

Until last year I used a ski coat from 1940 as my winter coat

Hmm, probably cookware from the 1960's. Furniture too, if that counts. It's possible something in the kitchen is actually a generation older, although I'm not sure.

If you include decorations as opposed to just tools it goes back almost arbitrarily (I have 19th century heirlooms, pre-settlement arrowheads and Cambrian period fossils), but I think the spirit of the question is more about things finding a totally pragmatic application.

Edit: I also have a touch-sensitive lamp of a similar age to the cookware. I'm not sure how it works exactly, but I'm guessing the entire exterior is one big capacitor, and it must have a very early transistor inside to switch it. It's not quite used daily, but it's sure interesting.

The radio alarm clock, couldn’t find the specific year only to narrow towards the late 70s.

My flat, the building was built around the beginning of the 70s.

• house, built in 1900
• me, built in 1974
• pocket knife, built in 1994

P-38 can opener from World War II. This little thing is the best can opener I've ever owned.

A large tooth comb I’ve had since middle school. I used it everyday until a couple of years ago when I switched to a brush better designed for my hair type, but I still use it on occasion. Not sure how I haven’t lost that thing throughout the years.

ETA: I’ve had the thing for over 2 decades!

If it's truly daily use only, then surprising myself, I think it might actually be my phone.

Probably my Granddads 1950s East German office chair. Got it when he passed since I always used to sit in it when drawing at his desk.

Gas spring is a bit leaky and the leather is a bit faded but it's more solid and comfy than anything new under €500 I tried.

I wear a cord jacket from first grade as a bolero (I'm in my mid 30s). I got older stuff but this usually weirds people out.

My flat was built in the 70s. So probably that. My violin is much older but I don't play much these days (certainly not daily).

My house is from 1884 so that’s used pretty often.

I’ve moved continents so I haven’t brought too many older items with me generally speaking

A 1797 George III Cartwheel penny, and some other old English coins. I don't use them as such, but I look at them daily. It's a great distraction from trivial issues to look at them on my desk and wonder how many people have owned them and what the owners bought with them.

My pocket mirror had a copyright date of 1914, but it's reasonable to assume it's a bit newer than that. It's probably around 100 years old.

I have a cupboard from 1789. I use it to store stuff, so yeah, I use it every day.

"Heet" liniment. I have an old bottle found when my father died. It still burns but it helps with the arthritis and other pain.

Probably my original day 1 psp.

The house that I'm in was built in the 1950's. It's small but cozy!