Tip for shoe laces

These are tips to put on shoelaces. I made this model for the competition. It seems like a good idea to customize the beginning of the shoelaces with special tips.
They can also be made in multiple colors, but it doesn't have AMS.
One model is made in two parts, the other in a single element which should block the lace.
I tried making them with PLA and PETG (what I had at home) but there are no substantial differences.

Yesterday, while I was organizing the wardrobe I noticed many clothes with strings and knots at the end. I think I will try these elements in these garments too, no more laces that "escape into their buttonholes" or ugly knots on the cords