Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
I dunno why they can't make one of these that actually stays firmly closed instead of letting your tea stuff slip out and float around in your cup when you don't want it to...

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: D: negative