Rohloff_Brompton_Rider
Formerly just_fixed
I use the camelback one where the spout folds in or tesco stainless steel flasks in winter to stop them freezing. Luckily the Brompton bag bottle pockets have roll down fasteners if the going is bad.I'm getting a couple capped bottles soon. Do not want to go through that again!
I fancy getting some Kleen Kanteen ones for summer.