If you had to go back to the olden days, what are 10 modern conveniences you would take with you?

So in a group I'm in I saw a girl post this and I really liked it. So here is a list of modern conveniences I would take back to olden days (say 1800s):

1. Hat - to keep my head cool
2. Sun glasses - to keep sun out of my eyes
3. iPhone w/ earbuds - would wipe it clean of all everything but music extraplus keep flashlight app on phone
4. Light Jacket - keep the cool air closer to my skin if I was going long distances.
5. Scarf -use to cover my nose and mouth to keep dust out of my face or to brake wind.
6. Sneakers with good socks - incase i had to walk long distances
7. Jeans- Cool during day and warmth at night
8. Swiss Army Knife - its 101 different uses
9. Lighter & lighter fluid - to make fires to cook and be warm
10. Antibiotics - could cure 90% of anything that I might catch...