Grenade 2026 Xmas advent calendar 24 bars brand new boxed 1st class postage Description The Grenade Advent Calendar is a limited-edition, gym locker style box, stuffed with 24 full-size bars. It’s the ultimate gift for gym-goers, snack lovers, and anyone who stays locked-in year-round. Behind each door, you’ll discover one of Grenade’s iconic, high-protein, low sugar bars. Unlock your box now to find out which door is hiding your favourite flavour: 1 x Grenade Oreo – Of course we had to lock this one in 3 x Caramel Chaos – the O.G. flavour 3 x Fudged Up – fudging delicious 3 x Peanut Nutter – the nuttiest of them all 3 x Jaffa Quake – Chocolate Orange, a classic festive combo 3 x Dark Chocolate Mint – another festive classic 4 x White Chocolate Cookie – a snow covered delight 4 x Cookie Dough – we couldn't wait for it to bake!