As you can see from the links at the top of the page there are two options for the survival pod this one and the Xtreme. I found that this kit is a much better fit for a pocket kit; however, that being said the other bag would be great to clip onto a pack.... but the catch 22 is its not on your person and would not be there when you need it. Also the larger kit is roughly 2.5 times the size of the key fob in length and roughly double the circumference. So keep this in mind if you decide to make a purchase.
Final Thoughts- This is a great little backup kit to always keep in your pocket. While the kit is nowhere near adequate for long-term survival it would work in a pinch if you are found with nothing but the keys in your pocket in a survival situation. I hope to do a review of a wearable survival bracelet (platform i believe is best for this style kit) in the future, but until then I believe this product is one of the better kit choices out there if you find yourself with nothing but the clothing on you back and the keys in your pocket.