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

Input:
The first one I got years back wasn't so great because the water tasted metallic after a few hours.  I heard they had improved the water bottle so I ordered this one.  No metallic taste and I feel good that I am keeping plastic bottles out of the landfills.

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