Secure containers - The Official Escape from Tarkov Wiki
I solved the Kappa problem. Carrot Container replaces it and Kappa is a 71 unlock. Donut because it's hilarious... (Carrot because it's the carrot on a stick to keep people questing!) :
Escape from Tarkov Collector Quest Boost - Buy EFT Quest Carry Service | Overgear.com
Kappa Secure Container (How to Get?) - Off-topic - Escape from Tarkov Forum
Secure container Kappa - The Official Escape from Tarkov Wiki
EfT Secure Container - Save your in-game goods with this tool