Yep :) . Any of these should do: https://www.amazon.com/s?k=retainer+case&rh=n%3A3760911%2Cp_36%3A-600%2Cp_72%3A1248873011&dc&qid=1623161844&rnid=1248871011&ref=sr_nr_p_72_1

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This one is the cheapest: https://www.amazon.com/dp/B08LCZ8D3B/

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Your dentist may even give you one for free if you ask. It's no big deal. A lot of people have them.