I have tried the two types readily available i.e. the clear plastic ones with red plastic bit holding the spout (with a ball bearing in it) and the opaque squarish ones with a black plastic bung holding the spout, again with the ball bearing in it) and both types leak. Not only is this a p. in the a. as regards soaking the bedding, hutch floor, but also makes it difficult to monitor water consumption. Any recommendations/ ideas please? :x