Article continues below advertisementNeil Patrick Harris and David Burtka revealed one of the challenges they have faced throughout their 11-year marriage.During a re-aired episode of TODAY With Jenna & Friends on Friday, December 26, the couple stressed the importance of adjusting to each other's drinking preferences.The duo joined host Jenna Bush Hager to discuss their book, Both Sides of the Glass: Paired Cocktails and Mocktails to Toast Any Taste, inspired by their differing relationships with alcohol.