I'm looking at this, and I'm not entirely sure that this could all fit in a backpack or other thing that someone could carry, and it's also got a lot of things that don't really make much sense to me. I'm not entirely sure why a survival kit would have shield grenades and a shield pylon. I'd encourage you to remove things that you don't absolutely need to survive.
I'm also not sure how it fits 3 weeks worth of water (63 liters, or 3 liters per day for 3 weeks) and 3 weeks worth of rations (63 rations, or 3 rations per day for 3 weeks). Maybe you could cut down on the amount of time, and switch from water to water purification tablets?