The Bronze Box (460 Pokécoins) contains 100 Poké Balls and 8 Lure Modules, while the Silver Box (980 Pokécoins) will reward players with 8 Incense, 8 Lucky Eggs, and 8 Lure Modules.
It is the Gold Box (2,480 Pokécoins) that is packed with the most gifts, with 50 Great Balls, 25 Incense, 25 Lucky Eggs, and 16 Lure Modules. Bought separately the Incense, Lucky Eggs and Lure Modules would normally cost 3,860 Pokécoins alone, with Great Balls unavailable to purchase.
Remember that between Sunday 25th December – Tuesday 3rd January 2017, the first PokéStop that you visit each day to reward you with one single-use Incubator. There is also a greater chance of finding Eggs that hatch Togepi, Pichu, and other Johto region Pokémon at PokéStops, and the Holiday Pikachu will also pop up.
Alongside this, from Friday 30th December 2016 – Sunday 8th January 2017 there will be an increased chance to encounter Kanto region starter Pokémon and their evolutions – Bulbasaur, Ivysaur, Venusaur, Charmander, Charmeleon, Charizard, Squirtle, Wartortle, and Blastoise.