Question regarding test strips and early testing...

Hi everyone.... I recently took a first response test and thought it was positive but unfortunately it wasn't 😕 but someone suggested those ultra sensitive test strips so I got some. So I see that you're supposed to dip it in urine, not pee on it, and after I tested that theory myself I see why.... 🤣 but what do you all use??!! I don't have cups that I feel like urinating in. Haha do I use disposable red solo cups or something???

Also, what's the earliest people have gotten positives? I know some say the day of your missed period, but that's too late!! Who can wait that long?!?!! Has anyone gotten a positive at like 7, 8, 9 dpo???

TIA 😊