You could use the same container each time aslong as you wash it out hehe
I never held my urine in for long periods of time. It's best to take them between 10am-7pm i think.
I wouldn't risk pee'ing on the stick unless they're mid-stream tests. I usually just use the foil pouch they come in and it's much easier


I bet i'm the only one who does that. *embarrased* haha, oh well it saves me pee'ing in cups, and i can threw the pouch away each time!! haha