I use badge holders which you can found at walmart , the advantage is that when I move a male I also move it's tag to the female's tub. Other advantage you can fully clean tubs in and out without worrying about tape.
Looks like this
This only contains their ID on one side and QR code on the other (QR code is used with Reptile Scan and allows me to see all the info for the snake in question)
Now for hatchlings that I have for sale I use wide painter tape for the ID and have a 4 x 6 card with feeding under the tub.