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

Input:
This thermos is borderline magical.  I brewed tea and stored it in the thermos this morning at 6 am, and the water was STILL too hot to drink at 12 noon!  Perhaps all of the thermoses I've had in the past were incredibly sub-par, but I was very impressed.  I will carry this thermos with me to work every day.

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