Tucking with bikini bottom not staying

I know how to tuck. The issue for me is as described, it does not stay. I know I can get tape or a tuck kit or a bikini bottom made for us to help it stay tucked, but I want to be able to wear a regular bikini bottom without a skirt. Does anybody have any advice?

Edit: So I have to use *something.* I tried KT tape, and it'll work. Apparently it's the same stuff as a tuck kit, you just have to cut it to length yourself. So yeah, thanks for the input, and I hope to be wearing a skirtless bikini bottom this summer!