Iron. The iron is placed in a pattern in the 3x3 crafting grid in the same way as the wooden bowl, but with iron ingots rather than wooden planks.
O: Nothing
I: Iron
OOO
IOI
OIO
You cannot craft a bucket using anything but iron, but they are sometimes found in dungeons. From the minecraft wiki: "There is, approximately, a 53% chance of finding one bucket in a dungeon chest."
No, as of today (April 1st, 2013) buckets do not exist in Minecraft PE.
Eventually, yes.
Eventually
You can fill the up with blocks or you can collect it using buckets.
Iron armor, buckets, anything with iron.
You can't MAKE one, but you can collect lava with buckets.
You can use up to three full buckets of water on it, to fill it.
Sugar in minecraft is used to make a cake but you also need 3 buckets of milk and 1 egg when you have made the cake you can eat it to gain your health. Also, in 1.4.2, if you combine sugar, an egg, and a pumpkin together, you will get pumpkin pie.
It will be out at the end of April. The new update will have redstone, Enderman, and buckets.
firefighters': The local tinsmith made the firefighters' buckets.
You right click whatever you want to place. You can place swords, buckets, arrows, etc.
There is no such thing as an Iron Cup in vanilla Minecraft, sorry bud. There are buckets though, and they are made by placing one iron ingot in the bottom center of your crafting table, and 1 iron ingot on both sides of the center row of your Crafting table.
Thermoplastic is a word for a certain type of MATERIAL. A bucket is the name for a specific ITEM. Buckets CAN be made out of thermoplastics, but they DON'T have to. Buckets can me made out of other materials too. And thermoplastics can be used to make other stuff than buckets.