My spittoon can hold any bodily fluids that you can think of. For the user’s comfort there are handles so you don’t drop the spittoon. In zero gravity the bodily fluids need to be contained or it could literally go everywhere. It is a comfortable size, it’s not to small but it is also not so bulky you can’t carry it around. The provided clip on the side gives you an easy way to store it on your belt. It is there when you need it but it doesn’t get in the way of the astronaut. The opening is also formed in an arced shape so it’s comfortable for the user. It can be 3d printed with any type of material because it’s structure is so stable.