If you go out o the beach you could collect sea shells and put them on something to make it more decorative.
Leaf shape ceramic box, handmade, slab built, green, trinket box by LauraHarmonPottery on Etsy https://www.etsy.com/listing/209321589/leaf-shape-ceramic-box-handmade-slab
Turquoise Ceramic Box with bird, Turquoise Raku Fired Box, handmade treasure box DavisVachon on Etsy
Turquoise Lidded Ceramic Box, Lidded Jar, Aqua and Brown stoneware Pottery, Surf, Waves, Slabs
Faux Stone Ceramic Box
Succulent ceramic jars ~ So cute!
Slab-built Boxes | East Chapel Hill High Ceramics
Handcarved Pottery Box, Black and White Ceramic Box with Bird and Floral Design… More
slab box with lid and lip
Ceramic Box By Hun-Chung Lee [don't know the age or cone temp but I like the simple design and locking lid, as well as the colour!]