This is THE BEST way to keep your beach towel in place safe and sound. ;)
Print some and use them …
… if you need them larger, some scaling will work!
It's an easy print without supports or anything fancy.
I suggest using PETG because normally it's sunny when you are at the beach and PLA does not like the heat. Furthermore, I recommend increasing the perimeters and top and bottom layers to increase the stability.
Enjoy!
The author remixed this model.
I combined both the clip and the hook, modified both, to creat a beach towel clip.