Ive been using the platform for years and honestly, you arent missing some hidden button. Its a persistent issue that Amazon doesnt offer a native share cart feature for personal accounts. If you want to avoid those third-party extensions, the most reliable workaround is using the Invite to Edit function on a Wish List. Youll need to move your cart items into a dedicated list first. Once youve done that, you can use the invite link to give your roommate full access. Most people miss the fact that you can actually specify quantities for each item by clicking the add comments, quantity and priority link. This helps manage the organizers and smaller stuff. The coupon situation is trickier since those are usually tied to the individual account that clipped them, so she might not see the exact same price on her end. Your hesitation about browser extensions is fair. While some users swear by tools like Share-A-Cart, they do require access levels that can feel a bit much if you value your privacy. Sticking to the list method is the most professional way to keep your 400 dollar budget on track without compromising your account security. Its a bit more manual than a single button click, but it ensures you both are looking at the exact same gray rug and power strips before the dorm rush kills the stock.