This little fellow seems to have gotten himself into hot water. It's his loss, but you can gain a nice little knick-knack. I had best luck with 10% fill and a thick shell (go figure). This fellow shouldn't need any supports or other help. He probably needs a bit of in-fill to avoid a hole at the top of his shell or his head. I also like him best with a thick shell -- it just seems right. Of course, YMMV.