GLAD TR DS 30GAL 15CTGlad Extra Strong Large Drawstring Trash Bags - 30 Gallon - 15 Count. Glad Extra Strong Large Drawstring Trash Bags - 30 Gallon - 15 Count. Glad extra strong trash bags are durable for heavy-duty jobs, indoors or out. These black 30 gallon bags are perfect for yard work, outdoor and garage use. The strong 3-ply drawstring allows you to close the fullest bag with one quick pull and carry it out to your garbage can. You can count on Glad bags to contain your messiest trash.