Ugh, I had a total nightmare trying this last year for a big camping trip. Some random tool I found basically doubled half the items when my buddy opened it. Definitely be careful with those quick-fix extensions. Quick thing, are you guys on a shared Prime Household or separate accounts?

• check your item quantities twice
• watch for price changes Just verify every single line item before he hits buy.

Amazon lacks a native API for sharing carts between standard consumer accounts, which is pretty inefficient given their scale. The most reliable workaround Ive found involves third-party browser extensions. You basically need a tool that parses the cart items into a temporary link that the other side can ingest. I recommend using Share-A-Cart since it handles the session-to-session transfer well. Its basically a two-step process:

• Install the extension and click generate to get a unique code.
• Send that code to your roommate who enters it into their own extension window. It works instantly and avoids the wishlist clunkiness entirely. Just make sure you both are on the same regional domain like .com or .uk otherwise it might throw errors during the item transfer process. Honestly, its the only way to do it fast without sharing logins.