I do the exact same thing with my butts Norm. When I'm on a hike or at a camp or picnic site where the previous inhabitants have left their beer,coke,water,and wine bottles or cans.....or even the killer cigarette butts I pick them all up and take it to the nearest trash can or recycling center.
I do feel guilty though about killing everyone else with my second hand smoke. NOT !.....It's BS.
I say we make it illegal for anyone to drink a soda,or beer,or anything in any sort of container outside of their own home. As a child there were several occasions when I stepped on a broken bottle or the sharp edge of a can which resulted in a laceration to the bottom of my foot that could have gotten infected and killed me.