Custom Epoxy Tumblers › Custom 40 oz (EPOXY) Image 1 of 1 Custom 40 oz (EPOXY) $55.00 40 oz stainless steel. Beverages stay cold/hot for 24 plus hours. Open/close lid and reusable straw included. Quantity: Add To Cart Added! 40 oz stainless steel. Beverages stay cold/hot for 24 plus hours. Open/close lid and reusable straw included.