This Vapur water "bottle" comes in other colors and I don't really know why I chose purple. But, anyway, this water container caught my fancy because I can easily flatten and roll it up once empty. That way, I won't be "displaying" an empty water bottle at the sides of my backpack when going home from a climb.
Despite the 2-liter bladder I recently bought, I still bring water bottles along because 2 liters ain't enough. LoL! A 3-liter bladder is on my to-buy list but I'm still waiting for Sandugo Market! Market! to have one available. I don't feel like buying cheap bladders because I read somewhere that some of them are made of materials that mixes with your water and makes it quite health hazard.
Sandugo's bladders are the cheapest branded bladders I could find, and until they have 3-liter ones available, I'd just use my current bladder and this Vapur foldable bottle.
By the way, Vapur stands like a real bottle when full.