What model?
Stay Free Maxi Pads
Marlboro
Rose’s Sweetened Lime Juice
Fig Newton and Oreo
Puffs Plus with Lotion
Q-Tips
Infusium conditioner
Dansko clogs
Kraft macaroni and cheese
Wrigley’s Extra Winterfresh
Tuborg beer (It’s been thirty years since I had one!)
Dansko clogs
Born shoes
White Rain shampoo (recommended by a dermatologist who is a hair specialist)
Chrysler
Bailey’s Irish Creme
Benson and Hedges
LL Bean for winter clothes
Oh! I forgot the most important one! Kraft mayonnaise.
Levis 501s
Fred Perry polo shirts
Ben Sherman shirts
Dr Martens boots
Kellogg’s breakfast cereals
Coke
Budweiser (sorry, I like what I like)
Marlboro
Ecover laundry & cleaning products
Charmin
Gillette
Sony
Hewlett-Packard PCs and printers
Nokia cellphones
nVidia
AMD
Heinz Ketchup
Levi’s 501s
Sony - televisions
Mazda (RX-7s)
Rolling Rock
Novalogic (Delta Force series of games)
Lever 2000 soap
Marlboro (but I quit monday)
Claussen Pickles (Halves and samichslices)
Hillshire Farms Baked Ham
MtDew (unless Mellow Yellow is a LOT cheaper and where the hell did Surge! go?)
Arizona Rx Tea “Health”
Gaaaaah!
I left out the Claussen Mini Dill Pickles. It is the only dill pickle above which no other dill pickle shall be held in the world of true dill pickles that we dill pickle lovers love.
While we’re at it:
Seymour Duncan electric guitar pickups
Floyd Rose tremolo systems
Proco sound cables
Dunlop 0.69mm guitar picks
Starrett machine tools
3M Kapton film
Berkeley Farms chive cottage cheese
Mrs. Fanning’s Bread and Butter Pickles
Arbus padlocks
Alaskan Airlines
Sharpie pemanent markers
Limca lime soda
Akubra hats
Stetson hats
Man O’ War spar varnish
Jasco paint stripper
El Aguila corn chips
Guererro yellow corn tortillas
Tuborg Danish beer
Johnny Walker Black Label whisky
Harp Lager
Jetco balsa wood gliders
Testors cement and paints
Loctite adhesives
Squirt soda pop
Canada Dry ginger ale
Jarritos sodas
Modelo Especial Lager beer
Driz-A-Bone waxed cloth dusters
Pendleton Mills apparel
Rouge et Noir Camembert and Brie cheese
Maytag Blue cheese
Fromage D’Affinois soft cheese
Cakebread Cellars
David Bruce wine
Ah-So cork pullers
Bodum café filtre presse
Chemex coffee flasks
Melitta coffee filters
Raybestos brake parts
Winston Tires
Anton Berg chocolates
Casper’s hot dogs
Swarovski faceted crystal
Maytag appliances
Arrid deodorant
Bosch power tools
GM cars
Levis jeans
Beagle ™ dogs, but others will do
Boy, that list makes look boring and middle aged. Not that it lies.
Dr Pepper
Reebok
Biffy: it’s a '94 Epiphone, red with a rosewood neck. 
Pepsi
Irish Spring (original green, none of the other types)
Mobil 1
Paul Newman salsa
Whoppers malted milk balls
Reese’s Peanut Butter cups
Crayola crayons’
Reach toothbrushes
Wrangler jeans
Nalley canned chili
Nalley mayo (better than Best Foods/Hellmans)
Craftsman tools
Gee whiz, Zenster. That’s not brand loyalty, that’s just your shopping list!
To me, brand loyalty means it would really pain you to buy a comparable item just because the brand name is different. So much so, that you would probably make a seperate trip to another store to secure your beloved brand name item, or go without until they restock.
If you were shopping, and they were all out of Best Foods Mayo, you mean to tell me you wouldn’t just shrug your shoulders and pick up a jar of Hellman’s? You’d rather wait and be totally without mayo, or make a trip to another store, than just buy the Hellman’s?
I fully understand about having preferences for certain brands. I usually buy the mayo with the red cap, I forget what the name is. But if they’re all out, I’m sure not going to go home mayonnaiseless 
The same with Ivory Soap. Would you go home stinky rathar than have to buy stop-gap soap?
I am brand loyal to Honda and Sony. Ford may make some good vehicles, but for me they are just not an option. I was going to add Close-Up toothpaste to the list, only because nobody else makes a cinnamon clear red gel toothpaste as far as I know. But this is another example of a mere brand preference (not loyalty). If they’re al out of close up, Colgate (or whatever) will do just fine for now.
Actually, there is no problem with this particular dilemma since Hellman’s and Best Foods Mayonnaise are the same product. (Walked into that one, didn’t you?) Yes, I would go to another store for Best Foods Mayonnaise before buying another brand. However, I never run out of the stuff because I always have at least one or two backup jars specifically to avoid such a complication.
And yes, most of the products I listed are the only type I will accept for that application.
Backup Jars. That’s not a loyalty, that’s a dependency