DEWALT 30 oz Black Powder Coated Industrial Drinkware Our 30oz Tumblers keep you hydrated on the worksite. The 30 oz Black Powder Coated Industrial Drinkware has a 18/8 Stainless Steel body. The dual-wall vacuum insulation will hold its internal temperature longer, which will prevent condensation and heat transfer to the outside. The clear, BPA free lid features a flip-top closure that snaps into place ensuring a spill-free drink time.