I shop in bulk. I grew up in poverty with bare cupboards and I genuinely feel ill when things run down. Plus I love to cook.
Chest freezer and kitchen freezer are always full - mostly frozen veg and portioned out meat (IE I'll buy a pack of 6 chicken breasts and pop them in separate freezer bags).
I batch cook so there are always 2 out of the 4 portion meals in tubs in the freezers too. I've just bought some freezer soup containers.
Full sized larder cupboard is full of ingredients - tomatoes, legumes, pasta, sauces etc. Plus stock of condiments, jam, peanut butter, tea, sugar, baking stuff etc.
I have a full door sized herb/spice rack.
And a utility room with spares x4 minimum of all bathroom/cleaning/toilet paper/shampoo type stuff. Minimum 3 months worth of dog/cat wet and dried food, litter etc.
Fridge usually only has veg, condiments, cheese, butter etc plus whatever is defrosting for the next day. And a big fridge shelf water filter thing.
I do a bulk shop every 3 months or so, lots of BOGOF and I swear the poor Tesco delivery man cries when he sees my order.
If I didn't need any fresh fruit, veg, butter etc I could probably feed myself and the animals for at least 4 months.