This is a mug from the original "CAT and ME!" goods line created by Kanae Ishii, an interior stylist who loves cats. I bought it a few years ago at a pop-up shop held at Isetan Shinjuku (I went specifically for this mug. It was very popular, and I barely managed to get one before they sold out). The sides are printed with the faces of Ishii's three pet cats, and each one has a different phrase: CAT and MILK! CAT and COFFEE! CAT and TEA! The milky white color and the slightly small size are also cute. The retail price was 2750 yen. I've used it a few times, but it's in clean condition with no signs of wear.