My little guy was 6.5 months old and getting his first two teeth at once. He was miserable and I kept seeing the Teething Tubes advertised. They were a bit expensive but I thought they should last well being silicone. I decided to try them and he loves them. They're his favorite things to play with and chew on. He bites, chews, bangs around, folds up, flings, and chases them around the floor. His gag reflex also improved after just a couple of days. Mom and baby both highly recommend these.