Secure container Alpha - The Official Escape from Tarkov Wiki
Secure container Gamma - 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!) :
Secure container kappa 手に入れました 【Escape from Tarkov】 - ゆずかまたまうどん
Secure Containers: How to Get Them & What to Put Inside // Escape from Tarkov Standard Edition Guide - YouTube
Secure containers - The Official Escape from Tarkov Wiki
Kappa Secure Container (How to Get?) - Off-topic - Escape from Tarkov Forum
Escape From Tarkov Insurance Guide - How to Protect Your Gear