To me, those designs reek of "cheap Chinese knockoff," and I suspect that you would be disappointed in the performance. (Wobbly, noisy, short spin times.) I would recommend looking on Amazon and finding one that has a high rating with a LOT of reviews. (If the rating is five stars, but only 4 people reviewed it - those reviews are from the seller and his family.) I had two metal spinners and wanted to try a plastic one, so I got this one, based on the ratings: https://www.amazon.com/gp/product/B072DZZHCK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

It works well and satisfies my curiosity. Looks like the same exact as a cheap knockoff from the local corner store, which has the wobby/cheap/short spin time thing going on.

There are some inexpensive metal options available too, for respected brands.