I bought one of each at the beginning of the winter and I've had to reapply now and again, but haven't nearly used half of either bottle yet.
Still would be nice to have spares. Remember one bottle is for 'fabrics' the other for leathers... with buy one, get one; why not get both?
To take advantage use the code APR50 for your discount.
Heck, it's a Canadian company, I love supporting those!