Were any koalas or animals harmed in the making of the BURST Floss? 21 October 2021 20:54 Updated No. But seriously, this product is not tested on animals. Related articles Why does the BURST Floss expand and how? Does the BURST Floss contain any PFA's? Is the BURST Floss biodegradable? Is the BURST Floss waxed? Why does the BURST Floss get stuck in my teeth sometimes?