Yea, so here's how Inventory Items worked (should have mentioned this). 

Unlike other Windows, you don't open your Inventory with voice commands. Instead you have to open up whatever your inventory item you have and a window will appear showing everything in it in a small list. After that you touch what you want in the window and it makes the item appear in your hand. 

You can have multiple inventory items, some are bags, others are special small magical items that can be worn on your person like a bracelet or an amulet, some are belt pouches and so on. 

So naturally if someone steals your bag or other inventory item from you, you're a bit fucked. This also makes using items a bit harder in combat. Granted you can hold things in your pockets (if they are small enough) but that may not be good for fragile items (like potions and such).