I keep $20 in my wallet, $40 in my car and we have between $500-$700 cash (big and small bills) in the house. The house cash is usually used for gifts to the kids or grandkids. I always ask if they would prefer cash, Amazon gift cards or Zelle to their checking account. DH likes to give a cash tip for his haircut or if we eat in a restaurant.
We each get $50/month for pocket cash. Lately, DH's goes immediately toward his collection of whatever ebay collectible he's collecting. Mine gets saved in a jar on my desk, currently $800. There was a lot more last year but I've been replacing all my Apple devices.
We keep at least a thousand in the home bank savings account, just in case of whatever. It's earning nothing, it's strictly for having it available immediately. I also keep an extra $500 in the checking account just to have a buffer. Looking at this now, I realize this is probably redundant! Going to rethink all this....
Then there is a good sized emergency fund in an online high yield savings, currently paying 3.30%. The rest, which is the bulk of the liquid cash is at Vanguard in the money market paying 4.5% currently.