We have bought a bottle of proper hand gel, and 2 pocket sized bottles.
Our cupboards and fridge/freezer are normally well stocked to deal with hectic lifestyles and things like snow/floods/doing too much and can't get to shops. So I could live off current supplies for at least 2-3 weeks, possibly longer (if I stopped for milk and fruit/veg once en route home to lockdown).
I have reasonable supplies of everyday meds, including cough and cold remedies and pain meds. I need to refill my asthma script (this week) and DD's script (next week) and will probably add an extra pack of cold/flu meds then.
I have a handful of ordinary masks from a trip to China 2 years ago (we thought the smog would be bad for my asthma, but it actually was fine so we never used them) - they are not the N95 type, but the more regular disposable medical ones (like a dentist might use). DH and I are discussing getting 2 washable N95 masks per person in the household, and a pack of spare charcoal filters, mostly because of my sensitivity to illnesses like this.
Normal foods that we tend to keep as "longer life" so very useful are:
Lidl's double pack of bacon lardons
Eggs
Cheese
Carrots
Potatoes
Onions and garlic
Rice and pasta and noodles and couscous
Tinned veg - a mix of tins of corn, peas, beans (carious types), chickpeas, tomatoes (and puree)
Tinned protein - tuna, sardines, corned beef
Jars - tomato sauce, curry sauce, sweet'n'sour sauce
Baking cupboard with flour, sugar, chocolate, yeast, baking powder and bread soda, vanilla, seeds, etc (so a mix of sweet and savoury things are possible)
Part baked bread rolls (and a tube of JusRol's croissants in the fridge to bake)
Butter, olive oil
Squash, sparkling water, beer, wine, teabags, coffee, hot chocolate mix
Seasonings - herbs, spices, jars of sauces like periperi or soy etc, vinegar, pesto ….so an ability to make e.g. a pack of mince fried up with onion and garlic into about 20 different things!!
And then chicken breasts, sausages, uncooked prawns and some red meat (although that's in low supply just now) in the freezer. And some batch cooked meals and leftovers also.
I buy fresh fruit, veg, meat and dairy most weeks - and have some in the freezer also. But I have had to go without doing more than getting milk in a corner shop some weeks when life gets really bad, and we manage fine.
Actually, if I was to spend a lot of time at home, I probably would need to get more ground coffee as I have a habit of using the cafetiere when at home a lot.....I often buy 2-3 cups of coffee per day at work.
And my "stocks" are all things that we like and use anyway - so I don't have a tin of spam as we don't eat it. And because we eat them anyway, they get rotated over time and replaced as and when we are doing normal shopping.