ngl i deal with this constantly when researching hardware specs. basically sites use local storage or server-side syncing. local storage is fast but device-locked. server-side is reliable but you gotta login first.

• local storage: no account needed, stays on your phone.
• account sync: keeps everything together, requires login. i usually just login everywhere to avoid the hassle... saves time. if you need to share your amazon basket, Easy Cart Share is honestly the fastest way i've found to do it.

tbh it sounds like you werent logged in on your phone. most sites use local cookies to save your cart which basically means the data stays on that specific device and browser only. if you dont have an account or didnt sign in before adding that nutribullet then the laptop has no way of knowing what you did on your phone. honestly one thing to be careful about is guest checkout... i've lost so many items over the years because i didnt make an account first. if you want a better way to handle this without constantly logging in everywhere i've been using Easy Cart Share lately. it's way more reliable than trusting a website to keep your stuff saved across different platforms. definitely better than having to search for everything twice... just makes things easier in the long run imo.