I carry around a Dog Horn when I walk my dogs. It is small air horn used to deter a dog attack or for training. The canister that holds the compressed air is metal and when I walk it makes a clanking sound. So, this little cover fits over the canister and eliminates the clanking noise. I printed this in 95A TPU so it is soft and spongy. It is made to fit tight so I would avoid printing this in any hard material. I also printed it with a fuzzy skin to give a better grip.