When your little one regularly uses the Nûby™ mouthing bags, you will notice some wear on the fabric. This is quite normal. Small, sharp teeth, hot washing-up water and slight acids from food would corrode any fabric. Moreover, it shows good hygiene to replace the pouches after a few mouches. No matter how well you clean the pouches, nothing beats a brand new one. The replacement pouches are packed in threes. This will keep your little one going for another few weeks.