Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
The Contigo travel mug used to be my favorite travel mug.  It kept liquids hot for hours!  But the lid is a little difficult to clean and after about 4 months of constant use, one of the inner o-ring seals fell apart (someone else posted photos on the Contigo mug page with the same broken seal).  It is still usable, but does not seal as well as it used to and does leak slightly now.  So after much research for a new travel mug, I opted to try the Thermos 12oz w/tea infuser in stainless steel. Great product so far! You do have to make sure you get both covers (sippy cover and top seal) on correctly, but once you do that, it will keep your liquids hot or cold for hours with no leaks (I often carry mine in a tote bag).  It isn't quite as convenient as the Contigo mug because you have to unscrew the top seal to take a drink, but still worth the effort. I am willing to sacrifice that little effort to be able to clean the seals easily. The tea infuser is a nice feature, although I use tea bags so I can't review on how well the screen filters. Overall, very happy with this mug and will be buying another in the near future, possibly the 16oz (no tea infuser).  I highly recommend this mug!

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