Camelbak Insulated Rocks Tumbler If you're into backyard cocktails (we'll be making this Mint Julep all summer long), the CamelBak Insulated Rocks Tumbler ($19) is spill-resistant, durable, and will keep your drink chilled all evening. They even make a version for wine-lovers. Image Source: amazon.com CamelBak Insulated Rocks Tumbler $19 from amazon.com Buy Now