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

Input:
These are pretty great! They don't leak and they fit in my son's lunch box perfectly! My only complaint with them is: my 18 mo daughter has tossed 2 off her tray and the straw part has popped off. After that happens, even if you pop it back on, the suction is broken and it won't work anymore. :(

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