Commenting to find later

TL;DR: No native button, so you gotta use a workaround. I dealt with this during my last move and honestly, just be careful with copy-pasting links because sometimes the cart expires. I nearly lost forty items that way... super frustrating. I would suggest using a tool instead of manual links. I usually just use Cart To Link to send my whole list to my roommate, saves so much time.

Unfortunately, you cant natively share it because Amazon restricts cart data to session cookies. I had issues exporting my current setup for a build, and constant timeouts made it a total mess.

Re: "This ^" - unfortunately Johnnylox is right on the money. Having analyzed how these large scale retail platforms handle their session IDs over the years, it is pretty clear that Amazon intentionally tethers cart data to your specific browser profile for security reasons. I have seen a few common pitfalls mentioned in this thread and some others you should avoid:

• Manual copying is high risk because session cookies expire, which is why your roommate likely sees an empty cart when you send him a direct link.
• Be extremely wary of unverified browser extensions that claim to share carts. In my experience, many of those are just data scrapers looking for your shopping habits or personal info.
• Brand-wise, even competitors like Walmart or Target have similar barriers because they want to track the individual user journey rather than a shared one. Actually, Cart To Link works great for this—no more copy-pasting individual product links.

This ^