Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
Love the way it keeps drinks hot or cold.  Be careful that each time you check to make sure that the drinking cap is on just right or it will leak.  (Don't wait til you're ready to walk out the door to check or you just might be changing your shirt)

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