How to build a Nether portal in Minecraft (and link two portals)
Their chests can hold 1 or 2 Obsidian, Flint and Steel and Fire Charges.

Flint and Steel is a fire starter that lights blocks, portals and TNT.
It is made with the Crafting Table from Iron Ingot and Flint.
An Iron Ingot and a Flint make one. Use it to set fire to a block, light a Nether portal frame, ignite TNT, or relight a campfire or candle. Each use costs durability.
Iron Ingot + Flint → Flint and Steel
// Slots with several items cycle through every accepted option.
Their chests can hold 1 or 2 Obsidian, Flint and Steel and Fire Charges.
At the Crafting Table: 1 × Iron Ingot and 1 × Flint give 1 × Flint and Steel. It can be found as loot in Ruined Portal, Nether Fortress and Abandoned Camp.
It lights fires, portals and TNT.
64 durability points: each use removes one, and it breaks when none are left. Mending and Unbreaking can extend it.
No: only one per inventory slot.
3 enchantments: Mending, Unbreaking and Curse of Vanishing.