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

Input:
Can't wait for my son to use his new lunchbox! It's bigger than I thought it would be. The double decker sandwich container is fantastic! And the water bottle is great to just take anywhere!

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