preserve (something) for (someone or something)
To keep something in an intact, unaltered, or protected condition for some future person or need. I want to preserve this specimen for inspection at our labs. He has done everything in his power to preserve this vast estate for his children and his children's children. I want to preserve this dress for my daughter so she can wear it on her wedding day.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
preserve something for someone or something
to save, maintain, or protect something for someone or some thing. Try to preserve some of these memories for your grandchildren. We learned how to preserve leaves for future reference.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.