These Eco-Kitty Catnip ball on a Silver Vine Wand is made of 100% Organic Catnip Leaves, Natural Edible Gum and Silver Vine stick. This makes their product a safe chew toy with guaranteed hours of fun! Silver Vine has been used for many years for its health benefits. The ecstatic response to Silver Vine by cats makes a good alternative to catnips. Silver Vine has a more potent fragrance that is guaranteed to stimulate and excite cats.