I cannot create a lot of suction with my mouth, and I purchased a bladder and tubing arrangement to increase my available water, and find that it is hard to get anything to drink out of it. The tube is fairly large bore (would smaller be easier or harder?) and I can only get a small sip at a time. Would a different brand be easier? would a shorter tube be easier? does the way you pack the bottle make a difference?
I currently have placed the bottle in a handle bar basket, and it is a Platypus brand. I sweat a lot when I ride, especially my back, so I am not keen to wear a backpack.