Wimem&reg; Insulated Stainless Steel Tumbler Cups, 16 Oz (Pink) Unbreakable stainless steel interior and exterior Durable Double Wall Stainless Steel Construction. Insulated cup with twist-on lid and straw Light and compact design for effortless transport and storage and fits most automobile drink holders easily operated with one hand Wimem-With Memory-We wish every customer who has bought our product has a wonderful memory with us.