Glasfuls or Glassfuls: How To spell?
The word Glasfuls is misspelled against Glassfuls, which is plural of "Glassful"
Glassfuls has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings gla & fuls which should not be misspelled with single 'S'
Wrong Spelling:  gla-s-fuls  Correct Spelling:  gla-ss-fuls 
Check more misspelled words of Glassfuls to spell it correct.