I'm on holiday - shipments will resume on October 23.
Each cup has a circle painted on in a Robin egg blue, some have two circles. All are glazed on the inside, fired, and sanded, to achieve a tactile feel similar to a beach pebble.
If you order more than one, I will find good matches for you.
Not microwave safe
Size: about 3" heigh and 2 1/4" wide