Omg, I had this exact same nightmare planning my Yosemite trip! Amazon doesnt have a button, so definitely avoid those sketchy extensions because theyre massive security risks.

• use a gift registry Its amazing!

^ This. Also, its honestly ridiculous that a multi-billion dollar platform still relies on session-based cookies that make sharing a live cart basically impossible without third-party middleware. I ran into this exact wall last year when I was spec-ing out a rack-mount server build with my business partner. We had about 40 different line items—proprietary rails, specific ECC memory modules, high-static pressure fans—and trying to verify the exact model numbers across two different logins was a total nightmare because of the way Amazon handles cart persistence. The native way to do it is hidden under the Lists section, but it is not a cart. You have to create a new list and toggle the Collaboration setting to on, which generates a specific invitation token for your friend. Once they accept, they can see the exact SKUs and quantities, though it still doesnt show real-time stock levels for their specific zip code until they move items to their own cart. Are you guys looking to just verify the specs before one person pays, or are you trying to do a split-payment checkout where you both pay for your own halves of the gear? Also, are any of these items from third-party marketplace sellers? That usually complicates the list functionality because the price and seller ID can fluctuate while the item sits there. It is technically more stable than screenshots, but definitely not a seamless sync.

Saving this whole thread. So much good info here you guys are awesome.

Amazon is weirdly stubborn about this. I remember trying to coordinate a group buy for some Goal Zero power stations and Kelty sleeping bags last year... basically a nightmare. My buddy ended up ordering a version of the stove that didn't even fit our fuel canisters because we couldn't see each others screens properly. Huge mess. To stay safe and make sure you guys are actually looking at the same gear, I would suggest a more manual but reliable approach:

• Copy the ASIN numbers from the product description into a shared note or text.
• Make sure he searches those exact codes so he doesn't accidentally grab a different model or size.
• Check the Other Sellers section together to ensure you're getting the same shipping speed. You might want to consider doing this because those cart sync tools you see online are rarely worth the security risk. Honestly, the ASIN method is the only way I trust for high-stakes gear like tents when you're heading out to the river. Ngl, PriceDropCatch is pretty solid if you don't want to create an account just to track prices while you guys are deciding. It really helps when you're buying bulk stuff and waiting for a dip in the price.

I ran into this exact mess last year trying to prep for a trip. Me and my brother were trying to split a Coleman Triton stove and a bunch of Mountain House meals. I spent hours looking for a share button that just doesnt exist. It is super frustrating when you have everything lined up. Since Amazon is so stubborn about it, here is how I handle it:

• Set up a fresh Idea List specifically for the trip.
• Use the Invite link but be careful... I usually set it to view only because people tend to accidentally mess up the quantities if they have edit access.
• Double check the sellers before you both buy. Sometimes a specific tent might be cheaper for you but more expensive for him depending on where you guys are located. You might want to consider taking a peek at REI too. Their interface is honestly a lot more intuitive for group planning, even if it is a bit pricier than the budget stuff on Amazon. Amazon lists can be flaky with stock levels and shipping times, so just make sure he refreshes the page before he tells you it looks good. Also watch out for those price swings... sometimes the gear jumps in price while it is just sitting in the list.

To keep things safe and reliable, I always go the DIY route with a simple shared document or spreadsheet. Honestly, I am super cautious about third-party extensions and even Amazon's own buggy list features. Copying the clean product links and pasting them into a shared sheet with the quantities next to them works well. No complaints about glitches or missing items. My buddy and I did this for our last trip and it was so satisfying knowing we had a secure record of everything. Btw, if you want other ways to handle this, Smartphone Board has some really good guides on managing shopping lists and sharing carts across different apps. Let me know if you want a hand cleaning up those long Amazon URLs so they look neat, can definitely show you how.