
I used to use the cardboard Newborn ones. They are very good, withstand cleaning well and last until the pups are ready to go if you use it as the pups bed too. However stains dont clean off easily, you end up scrubbing away the top layer of paper and it never looks 'clean' no matter how much you disinfect it. They are good value for money and you can recycle them after. Very handy for if you only plan on having a one off or occasional litter.
This time round I've brought a Link-a-Bord one. Looking forward to ease of cleaning and no stains! :-D