Not exactly daily but the shovel I use to clean out my grill ashes was my grandfather's, hand forged and used for branding iron fires, gotta be 100 years old. Then a phonograph from 1960.

My dick. I've used that every day since I was born.

The dresser in my bedroom was my dad's and it's older than me. I think it's around 50 years old.

I bought a 1200w power supply in 2013 that is still going strong. Daily driver I've moved from case to case as I have upgraded over the years.

Probably the silverware that I grew up with.

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

My wallet is the last piece of leather I will ever own.

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

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

My '97 car?
Clothing? Furniture?

My 1880 foursquare.

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

I have balls of yarn, knitting needles, and crochet hooks from the 60s and 70s. Also, most of my home appliances, like fridge, tv, washing machine, and microwave/oven, are about 20 years old and working perfectly.

A vehicle.

kitchen radio. It is one of the first portable tube radios, built 1958 or 1968 (dont remember). Internals died a few times, retro-fitted by a UKW radio receiver, then an MP3 player, now its a Raspi radio. It runs most of the time if I am at home

3 piece safety razor from the 1950s. And soon a watch from 1950 too. Its a wind up watch.

My house but it isn't really that old, around WW2.

Although I have some games that are 100s or even 1000s of years old, but that is a set of rules rather than a physical thing.

My knees

One of my bike's is 30 years old, and I use it all the time.

But as far as oldest stuff I still use, probably things like certain furniture, tools, and kitchen stuff, which would have been inherited from grandparents who have long passed.

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.

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.

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.

Used to use a double edge razor from the 1960s, I still have it. Gillette Slim.

I just use a modern DE instead, 2015 I think. Feather AS-D2.

Both of them will probably outlast me. Especially the Feather, even though it's newer and therefore theoretically made with less care, it was made in Japan, and it's entirely stainless steel, not pot metal. Very strong. You'd need to run it over with a truck to break it.

If cared for, nothing is stopping the Gillette from going another 60 years either.