Jennifer Aniston and Justin Theroux made their way around Kauai on Monday, both showing off the personalized rings they bought together earlier this Summer. She kept Justin close, affectionately placing her hands on his shoulders as they headed inside a shop. The couple emerged later with their purchase in a black gift bag. Jennifer and Justin did the trek to Hawaii in order to be with their mutual friend Christine Taylor as she celebrated her 40th birthday. Her party was later Monday night, and Justin was seen handing off the gift in the black bag. Jen and Justin were out for more fun yesterday, leaving their hotel in a rented SUV to pick up fresh fruit. It seems Jennifer and Justin are sticking around for some private vacation time following Christine's shindig as they prep to hit the promotional trail together for September's Wanderlust.