The majority of litter on the sidewalks of the through streets near me is those 1oz shooters. Followed by aluminum cans (mostly beer), fast food trash (plastic cups for sauces, disposable drink cups), and then household trash that looks like it flew out of a trash can on windy days (empty boxes, plastic wrappers, a bottle of laundry detergent, etc).

Source: new year's resolution to pick up at least 1 piece of trash per dog walk.