Where do astronauts 👩🚀 keep their sandwiches 🥪?
In their launch box! 🚀📦😂
Launch Box
Explanation
Explain Bear
Listen up, buttercup! You see, astronauts go to space in a "launch." Sandwiches go in a "lunch box." Get it? Launch box instead of lunch box. It's called a pun, genius. By the way, your brain is so smooth, you could use it as a whiteboard!