cigarette butts on the ground harm plant growth Please Do Not Throw Cigarette

I thought you had to be at least 70 before anyone condescendingly called you "SPRY." Maybe if I imagine the clue as meaning "still moving (at all) when you are well over 60 years old," I can live with SPRY as the answer

Hammering the heads might deform them but they cannot move/go anywhere (you cannot 'drive them in') because of the shoulder

Nicotine stains are very noticeable, they can cause discolouration and are an unsightly dirty yellow-brown colour

Note the pocket, which isnt ideal, but its definitely more convenient due to the wider cutout

Since electronic cigarettes pose less of a health risk than regular cigarettes, they can be used as a last resort, that is, when nicotine replacement therapies, nicotine-free smoking cessation medications and smoking cessation programs have not worked or are not applicable to you