These little guys work great. Only reason it's 4 stars and not 5 ...
These little guys work great. Only reason it's 4 stars and not 5 is that the mug geometry matters a very little bit. If you mug has a large slope on it's sides, not all of the perforated sharks tail sits in the water. It's not usually a problem though. I found the tea flavor is still good and you just don't pack the tea quite so much and it works. Enjoy!
Rating: 4 stars