- Ammo box
If charging a LiPo goes wrong it can have serious consequences if you do not take action on time.
But fire can not go anywhere in an ammo box and will not burn your house.
Ammo boxes can be bought on Ebay for around $30
- LiPo bag
A lipo bag is fire inhibiting, after a while the bag will also burn.
But in most cases you have enough time to take action.
LiPo bags can be purchased from $2 but I would not trust them.
Buy one at the local hobby shop.