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:
Perfect for someone on the go, you can throw your coffee into your backpack and there are no drips at all!  You just have to remember to screw it closed all the way. Mine stays hot for about 3 hours, even when it's cold outside.

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