I have purchased a few of the Kong dog toys and all I can say is WOW! Generally when purchasing toys to chew I figure it may last a month if it turns out to be a favorite. We have one ball thats still going strong 6 months later! There is also a treat holder that had held up almost as well but it is starting to show a little wear and tear. \n \nLong story short, I feel these are excellent additions to the toy rotation and well worth the investment!