Me and DP chatting about this earlier. Without fail the things we buy only in December are:
Pringles (they're just not a normal crisp to us if it's not Christmas
)
J2O in the glass bottle - even though we'd never have them from a pub for example, bang on December they're there in the fridge! As a child we thought they were very posh
so they've just become part of Christmas
Toblerone - they always tempt me when I've seen them in airports etc but no, no, no. Xmas only, soz.
After Eights - see above.
Anyone else?