Customized Tumblers & Travel Mugs, The Newcastle 20 oz Double Wall Stainless Steel Mug - Spill-Proof & Powder-Coated, A fantastic mug that features either a durable powder-coated finish, a brushed metallic grey, or brushed silver finish. Exterior is stainless steel with a plastic interior. Features: Double wall construction. Convenient clear lid with a spill-proof seal. Powder-coated mugs feature a stunning silver-accented rim. We have now eliminated all single-use plastic packaging materials on our reusable bottles. ... #S966 $5.61/each.