DS is hopeless with properly closing bottles before putting them in his bag, he always forgets despite me constantly demonstrating and reminding him.
iON8 and Tinc bottles don't work for him because there's 2 steps to the close and seal process. He snaps the lid closed but forgets to close the little U-shape hooky thing and it leaks all over his bag.
I'm looking for something that only takes one step to seal.
Sistema Twist is a write off because unless you twist it really tight it just leaks. I'm eyeing up the Camelback Eddy, has anyone tried it? Any other ideas?