flip [intransitive, transitive] to turn over into a different position with a sudden quick movement; to make something do this
The plane flipped and crashed.
(figurative) She felt her heart flip (= with excitement, etc.).
flip something (+ adj.) He flipped the lid open and looked inside the case.
I have a water bottle for children. The bottle has a top that covers the rubber straw by pressing it down (picture 1). When we push the top open, the straw flips upward due to the compression and may hit the child's face or eyes.
is it okay to say "Be careful, it may flip your face" or "Be careful, it may flip into your face" in this case?