You know that he won't let you down. He's always been there for you through the good and the bad times. Your friendship and the bond between the two of you have grown stronger through the years and there's no way it can be broken. Celebrate that friendship as you give him a personalized tumbler that he can always bring with him. Choose one that reflects his love for sports or the outdoors and one that will last for a long time much like your friendship with him.