Cọc Vặn Ren Giữ Kính Mát Và Đồ Giá Trị Dùng Trên Bãi Biển

A threaded stake, that is designed to screw securely into sand and to hold your sunglasses or small valuables likes chains or rings above the sand, to make sure that they don't accidentally get buried, damaged or filled with sand.

Depending on the density of the sand, you might be able to not screw it in all the way, leaving you with more space. Also, if you printbed allows, you might consider scaling the model up lengthwise :)

The hook on top makes it easy to carry around, hanging it on your backpack or bag and to store when not in use.