Not sure I'm interested in the sole protectors for my ski boots. I've had them before, but if I don't have a bag in the lodge to put them in, I'm not interested in putting the mud and snow covered devices in my jacket pocket.
Luckily I ski with a backpack all the time, so they just go in there. Usually they're mostly just wet after walking up to the lift (walking on snow in the base area around the lifts helps clean any mud/dirt off). Bang them together a couple times and the snow comes off. For someone worried about them being dirty though, you could always just keep a plastic bag with you to put them in inside your pocket so the pocket itself doesn't get dirty.