There is a screen that goes all the way around inside. I have to get a bigger one with a basket. I saw a couple of nice ones last week at a local Japanese market.
Actually, I was kidding. I've found the basket doesn't allow the tea to "bloom" correctly, and leaves me with weak tea. The type you have, and the type that have a FINE ceramic screen inside are my favorites.
That's what I thought but they didn't have a larger size with the wrap around screen. I need to go visit again and ask them.
+1 +1 Seriously, I split between various "themed" mugs (one favorite: "Stay Awake, Stay Employed") and travel mugs.