vanki 1 pc Stainless Steel Collapsible Pocket Cup This is a useful and nifty little cup if you ever want to have a small drink on the go.It is also very light in weight. This collapsible cup is made from stainless steel and is attached to a key chain and clip to allow for easy transport. Usually, you will get it actually in 9~19 days, If you are in the USA and the item is NOT Fulfilled by Amazon. the item will be sent to you by USPS with shipping information from China. The estimated delivery time offered by Amazon is not the real time. Your patience is highly appreciated. Hope you will receive your item soon and enjoy using it. As for the cup itself, the rings fall into place easily, and with a slight pull can be securely fastened. About us (vanki), Professional factory, welcome to our store for more choices with best price. What we pursue is your satisfication of our service, not just for our goods.For any reason you are unsatisfied with our product at any time, simply contact support for exchange or refund. we will reply you about any question you ask within 24 hours