Quick Inexpensive Birthday Present for 21 year old: Hangover Survival Kit. My boyfriend was turning 21 and since we had just recently started dating, I had no idea what to give him. Since he was going to Las Vegas, I made him a hangover survival kit for his trip. Was able to buy most of the things at our college convenience store and the tin box and tissue paper and larger stuff at Walmart. Took less than a day and only about $30 dollars, and he loved it!