The patented Wideslide™ wide opening makes filling, cleaning and draining the bladder easier than ever - and it's 100% leakproof. All SOURCE Hydration Systems are low maintenance & easy care thanks to the unique GlassLike™ and GrungeGuard™ technologies. Water stored in a SOURCE Widepac tastes like water and stays fresh for days and even weeks - with no plastic taste thanks to  TasteFree™ Technology!