To add to the point above: I definitely agree with being wary of those browser extensions. Over the years, I have seen way too many people compromise their account security by granting permissions to random tools just to save a few minutes. Safety first, honestly, especially when your payment info is attached. I have to disagree slightly on the list method being too slow tho. In my experience, if items are going out of stock quickly, a Wish List actually updates in real-time better than a static cart link would anyway. But before I suggest a specific workaround, are you planning on one person paying for the whole thing and the others paying them back, or do you need each cousin to be able to grab specific items themselves? Also, are you mostly on mobile or desktop right now? Knowing that helps because the mobile app has some weird hidden sharing features that the desktop site lacks sometimes...

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Jumping in here because hqsniqnfko is spot on about the security stuff. Those extensions are super sketchy and ive heard horror stories about accounts getting locked right before big events.

• Honestly this whole situation reminds me of my sisters wedding back in 2019.
• We were trying to coordinate the floral arrangements and she sent us all these different links through email but half of them were broken by the time we clicked.
• It turned into this massive family argument in the group chat because everyone thought someone else had already bought the centerpieces.
• My aunt ended up buying the same set of 50 gold vases twice and then we couldnt even return them because of some weird third-party seller policy.
• Unfortunately, that whole weekend was just a mess of logistics and we ended up with way too much lace and not enough chairs.
• Just thinking about it makes my head hurt lol, it was a total disaster.

OMG, I totally feel your pain! Trying to coordinate wedding stuff is a literal nightmare when you are on a deadline! Honestly, its super frustrating that Amazon doesnt have a big Share This Basket button right there in the UI. Ive tried every workaround under the sun for group buys and housewarming parties and let me tell you... it can be a mess. If you want the absolute fastest, most direct way to get those 15 items into your cousins hands tonight without them missing a single thing, you really should just use Share-A-Cart. I know you said you were wary about the data, but I use it all the time for splitting costs on big events and its a total lifesaver! Seriously, I love it because it handles everything in like two clicks. Here is why its the best:

• It creates a tiny code for your exact cart contents instantly.
• You send that code to your cousins and they just plug it in on the site.
• It moves everything into their basket in one go so they dont have to hunt for specific skus. If you are totally against apps, the only native way is using a Collaborative List which is kinda buried. You make a list, click Invite, and make sure to set it so they can add and edit. It takes a few more clicks than a cart link but it gets the job done for a group... just gotta move fast before those items sell out! Hope the wedding is fantastic!