Adorable and lucky! (yes, acorns* are lucky--protect yourself from the "brutalities of the day") Easy to use, plenty of room for your tea leaves to expand. No flavor. Washes easily.
Color is more like the second pic :)
*During the Norman Conquest, the English carried dried acorns in their pockets to protect themselves from the brutalities of the day. Who can't relate to that? Also a symbol of luck, youth and power. It also represents stable spiritual growth.