Spider by restcrew but I've added a 10.3mm hole in the body to fit a nano geocache container.
Fits a 1.2ml screw top vial perfectly, its a tight press fit but I've sealed the edge with epoxy resin too.
Recommend using your strongest tape/ glue on the bed for printing this. I had 4 failures before giving in and using masking tape on the bed. Printed with the legs pointing upward.