Miscellaneous emergency items such as medicine, sunscreen if you forget it, first aid supplies, etc
I forgot sunscreen on my first trip to FL. Which is extra sad because I'm from CA and know how important it is! I had the distinct privilege of buying the world's most expensive sunscreen ever at my hotel. I've never forgotten my sunscreen again!
forgotten items like sunscreen, Motrin, ponchos
i HATE overpaying for this kind of stuff but i know if i don't have it i'll end up needing it-but i hate schlepping it along with me on vacation so..... i end up mailing myself a flat rate mailer to the resort with a small supply of all of our 'just in case' stuff. it's stuff like pepsid, immodium, motrin, Benadryl, a small tube of desitin (great for heat rash), clear eyes and sunscreen/aloe gel in case the sunscreen didn't work, band aids, eyeglass repair kit, nail clippers/tweezers. it's less expensive to send it twice (to/from) then to have to buy even one of these items at resort prices.
since it's flat rate, if I still have room in the box I shove stuff I don't nesc. want in my suitcase (kid's water shoes/flip flops).