Absolutley love the swell bottles. We brought ours to the hydrotherapy sauna and steam room spa to keep us hydrated. Everyone else had to use disposable 1/2 cup glasses that warmed up as soon as you went into the sauna. We brought our sell bottles and the water stayed cold the whole time and completely added to our hydrotherapy experience of drinking cold water while steaming away and saved us from using the disposable cups at each sauna. We needed a replacement list for the traveler and contacted swell and they sent us a new one so we can continue using our bottle and not using disposable cups and bottles. Cant say enough good things about these products and the company. I have three bottles and two travelers from this company!