"Strong tubes (1/2"" diameter) are super tough and can take very aggressive chewing. Give your child a better choice and save clothing, pencils, toys and other things from getting chewed up. Strong tubes are made of BPA-free, pthalates-free, lead-free, PVC-free, latex-free, non-toxic materials. They are top rack dishwasher safe. Increase focus, attention, and allow your child to self regulate in a discreet manner. Strong tubes on the neck lanyard allows your child to wear the strong tube like a pendant necklace for fast, easy and discreet usage. The necklace includes a breakaway clasp.Chubuddy stands behind all strong tubes with our excusive 90 day, no-chew-thru warranty. We want you o be completely satisfied with your purchase and we stand behind our products. " "*Neck Lanyard Chewy Holder with breakaway clasp*1/2"" tube diameter*Most durable tube that is fun to chew*90 Day, No Chew Thru Warranty* 3.0 Chew Factor Strong chewers*Helps kids self regulate*Satisfies chewing needs*Increases attention and focus"