Features: Take on the cup stack challenge and try the online phenomenon yourself We've got our own set of professional stacking cups here, made from a strong plastic that won't crumple, but is light enough for speedy stacking attempts It's the ultimate personal speed test and great for improving hand-eye coordination Ideal for attempting the cup stack challenge Special vent holes to release air Description: Material: Plastic Height: Approx. 9.5cm/ 3.7" Top Diameter: Approx. 5.3cm/ 2" Bottom Diameter: 7.8cm/ 3" Color: Blue, Red, Orange Package Included: 12 x Quick Stacker Cups 1 x Instructions Ships in 7 business days. It is shipped from China. Delivery is provided by China Post Air Mail. Delivery time depends on the couriers, local customs in your country also holidays, weather conditions. Usually it takes from 39 to 60 days, depending on the customs at your country.