I asked Twitter to name brands you can visually identify without the logo. Here are a few clues from your suggestions — a reminder that identities are more than just wordmarks and symbols.

Adidas stripes
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O2 bubbles
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Absolut bottle no label
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Science Museum typeface
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Apple Wallpaper
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Paul Smith purse
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Coca-Cola bottle contour
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Converse
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Honda slogan
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Macmillan poster
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Big Mac
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Ikea instructions
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Burberry tie
Image credit: suitored.com

easyJet uniform
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Guinness head
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All your replies:

Apple (@chrismcobble)
Coca-Cola (@limpa)
O2 (@internalmachine)
McDonald's (@keyondesign)
Absolut, Target (@AnnLikesRed)
Marlboro (@twotribes)
Nike (@AnkitBathija)
Macmillan, Waitrose (@stephenkelman)
Dyson (@iandevlin)
RAC (@LiamSwift87)
Cadbury (@thecardbiz)
Guinness (@MacRamsay)
Burberry (@cog_design)
Twitter, Converse, Vans (@jclin1)
Cath Kidston (@gray)
Toyota (@hanux9)
Goodyear Blimp, Geico (@duomark)
M&S, The Science Museum (@michaeldowell)
Starbucks, Red Bull (@thegighandle)
Easyjet, Paul Smith, Orange, Louis Vuitton (@leejdavies)
Adidas (@QuietBritAcc)
Ikea, ESPN (@uberryan)
Lidl (@caffeine_code)
KFC (@cristirus)
Kleenex (@josiahsprague)
Jif (@sjgreen)
BP (@BlairThomson)
Cleveland Browns (@BrandMooreArt)
Lego (@ben_gc)
Volkswagon (@markbowley)
Pepsi (@juanmagdaraog)
Dyno-Rod (@KieranHarrod)
Honda (@minxlj)
UPS (@AndrewKelsall)

Depending on who you ask the list could include almost any brand name. Shapes, typefaces, colours, patterns, illustration, photography... they can all play their part.

Related:
Colour in branding, on davidairey.com
Remove the logo and still know the brand, on LDL