Misc: Mustard, ketchup and onions on a hotdog are all ?

Questions

What was the maximum weight permitted for the first flight attendants in 1930?

What is the largest antique ever sold?

What sport would you hear the term ‘gorby’ mentioned?

What was Kleenix® known as when invented during World War I?

What did soldiers during World Wars I & II use Kleenix® for?