This is my daily go-to at work for brewing tea to drink straight (no sugar or cream).
Fits well in my hand
Doesn’t leak unless you turn it all the way over
I can brew one batch of leaves in the cup, and still have more in the lower compartment for being on the go on a long day
Fine mesh strainer doesn’t let anything through
Insulates very well – I don’t burn my hand, and it stays fairly warm for a decent period
Can’t remove leaves from bottle after brewing
Small bottom interior means I can’t fit my hand down in for thorough cleaning
If you take it all the way apart for washing, it’s hard to get it dry, and you end up with moisture/steam between the walls
I’ve got a green one with leaves printed on it – there’s a blue one as well. I got mine on Amazon.