Q1) Do you use a water bottle when walking/hiking?
I have a 2l bladder with water (for hydration and cooking) and 2 x 500ml water bottles with flavoured drink (for hydration and refreshing my mouth).
Q2) Would you consider using a collapsible water bottle so that when you have finished the drink it can fit in your pocket?
No - the space occupied by my bottles is not required for anything else during the trail, though my bladder collapses as I drink.
Q3) How much water would you like a water bottle to hold for your walks/hikes?
If a choice of only one size, half a litre. Otherwise, a half and one litre
I consume 1-2l on my walks/hikes, which depends on how warm it is and how much effort I'm exerting.
Q4) How big would you like it to be when it is not collapsed?
Most commonly I carry 500ml bottles, so I guess 500ml
Q5) How big would you like it to be when it has been collapsed?
See answer 2
Q6) Would you like the bottle to have a built in straw for ease of use?
No, the bottles I use have a push/pull locking/opening system which I prefer. Though my bladder has a straw with similar bite open/close system. But if it does include a straw needs to be of sufficient diameter to get a bristle brush in to clean it.
Q7) Would you like the bottle to be held in place while it is collapsed? (Strap to keep the two sides together)
A velcro fastener or similar might be helpful to keep it rolled up when not in use.
Q8) would you like the bottle to have a clip/strap to connect to your bag or to hold onto.
No - my bottles sit comforably in the side pouches of my pack, or the back pocket of my gillet.
Q9) What variety of colours would you like the bottle to have?
No preference as long as it is transparent.
Q10) Are there any other accessories you would like added to the bottle? If so please specify
Ensure the filler/feeder cap is leak proof. The neck top wide enough to fill from any water source.