“We all know it is best to avoid a large cup of coffee before a long trip, especially if restroom breaks are limited. Caffeine intake can increase both urinary frequency and urgency,” says Sue Heikkinen, MS, RD, registered dietitian for MyNetDiary. “If you don’t regularly drink coffee, you may be even more sensitive to this effect.” If you are planning for a long trip, then check out The Best & Worst Car Snacks for Your Next Roadtrip.