The Flex measures 18 by 13 by about 9 inches, has a comfortable strap drop of about 9 inches, and weighs approximately 5 lbs ...

Fill it with ice-cold water to keep you hydrated and refreshed ... without worrying about carrying around plates and bottles. The Mainstays Stadium Tumbler in Teal ($5) is the ultimate adult ...

Plus, they're only $7. Available for a fraction of the price, the double-wall Mainstays cups hold 26 ounces of liquid and come in two styles: an ocean-inspired design and a diamond-studded design ...