I have used this previously when it leaked. So I am giving it another try. After two uses, no problems. But it is not labor free. You must really be attentive to the cap, ensuring that it is tight and always clean it in warm water afterward. As a long time cyclist I have used this and other methods regarding GU type supplements. I am not sure that just bringing along a small plastic bag to use for the discarded individually wrapped product is more of a chore than using this product. I continue to test this proposition.