 Navaj is available at Sam's Club, Walmart, Walgreens, CVS, or online at navaj.com. Navaj. Breathe easy. WTOP and Silver Diner now bring you Free Lunch Friday. To thank you for listening to WTOP, whether you're at home, at work, or on the go. Three winners every Friday. Enter to win free lunch courtesy of Silver Diner and plan your next luncheon with up to five additional guests.