I have placed several sizeable orders at HydrateM8 over the past couple of years, and have always found the service, communication, and product quality second to none. My family and I are extremely active - we hit the gym, squash courts, and exercise classes several times a week during winter, and go hiking and cycling a lot during the spring and summer (these bottles have been to Everest Base Camp with us!).They are absolutely invaluable to us. They remind us to stay hydrated, and they're also the only sports bottles I've used that don't leak! They might be slightly pricier than supermarket versions but, I'm a great believer that if you buy cheap, you buy twice!