"Have had" is the Present Perfect tense in English. The Present Perfect shows that something started in the past and has continued up until now. For example, "I have had arthritis for ten years." This means my arthritis started ten years ago and I still have it. There are many different uses of the Present Perfect tense in English.

You would typically use the phrase "have had" in a sentence regarding objects, possessions, or materials. example: "I have had Sarah's brand of snacks too. They are delicious."