Does anyone know the possible contents of the League of Legends Wootbox?

I just ordered one, and I'm curious about what exactly it can contain. I know it has a shirt, an in-game skin, and some sort of limited collector's goodies, but I couldn't find a source on what exactly it can contain. I've seen on reddit that people e-mailing Riot asking about the content only got "It's a surprise" as an answer. So has any of you bought this box or does anyone have more information about this? I'm so curious about what it will contain. {{sticker:slayer-pantheon-rainbows}}
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