Kahtoola's Multi-use Crampon tote incorporates a drawstring, webbing loop and mash base so that you can carry it how you like and it won't fill with melted snow.
Kahtoola says: Our crampon tote sack is made of durable PVC-backed polyester with a breathable mesh bottom. It holds our KTS and K10. It also features a draw-cord and cord-lock for easy, secure closure, as well as a loop for attaching to your waist belt or backpack.
Kahtoola's Universal Tote Bag is a great product, its a tough sack for transporting your Kahtoola crampons and it has a mesh base to let the melting snow out and a belt loop so you can attach it to the outside of your pack. Just whats needed - no fuss, just a well thought out product.