Swell bottles are pretty, though there are very generic ones which are the exact same model and manufacturing. I worked on a campaign for a cold water drink designed for water bottles last year so for our photography we ordered dozens of bottles to feature, and quickly realised Swell were just charging a huge markup on their bottles because of the design. To be fair, every time I see them I’m tempted - I saw the Commuter one in John Lewis yesterday and despite having a drawer full of water bottles was tempted 
I have a generic one like the Swell range for the gym, and a Jerry Bottle one at the office. The jerry on his my favourite size and shape, though their twisty metal caps are a bit annoying. I drink sparking water from a kitchen fountain at my desk all day so just leave the top off mostly.