This bottle is VERY nice in appearance and is great! The cap is big and it comes with an adjustable cap on the inside as well. Although, I only have had the water bottle for a week (not sure if it was the heat or not) but the label on the bottle has been smudging off and the dye has been on my hand. With that being said, it works great with the alkaline stick but it is hard to remove the stick after the time is up. Overall, the functionality of the water bottle is fantastic minus the dye part coming off.