I have just spent 15 minutes, half my fingernails and a bent knife trying to open a bottle of plughole unblocker. I have rheumatoid arthritis and even normal jar lids are difficult for me. I can't 'push and turn' - I can barely do one or the other. AIBU that many elderly, physically impaired, those on medication and those with just not much strength are disadvantaged by these inventions from hell because the childed can't watch their fucking offspring more carefully?