title_body: How to preserve crema when pouring a shot into a drink?
upvoted_answer: This link from Seasoned Advice might help you. The accepted answer recommends to use an espresso brew pitcher and how to use it. The answer suggests two main things:
  
  
  a vessel with a pour spout helps with retaining the crema;
  the speed of the pour is important.
  
  
  See more information at that link. It suggests that if you pour it in too fast, you ruin the foam. Too slow and the foam gets stuck. Practice sounds important here.