Masonry grout bag - GIF

[meyer77]

I have used one of those many times, not the powered ones, ones like a cake decorating bag. I never had the need for a powered one as the times needed were few.
I did do a boys HS in NJ (8,000 sq. ft. on mud) three of us grouted a little over 1,500 sq.ft. (12x12) in 5 hours.
One summer I was a little slow and offered to help out a mason friend. The one and only time, a 12x12 tile is a lot lighter than a 12" concrete block!