Other than the plethora of cigarette / cigar butts and pistachio shells in the sand, it was very clean. (havebabywilltravel.com)
Empty pistachio shells serve as an important visual cue, encouraging snackers to be more «mindful» as they eat, thereby curbing calorie consumption. (fitwirr.com)
«This is in keeping with existing research showing that when a person has visual cues of «leftovers,» such as pistachio shells, they can see how many or how much they have eaten, helping to control portion size and consumption.» (dietsinreview.com)