I use this.

Here are the cables I carry

• 2x USBC to USBC (for laptop, phone, and razor)
• 1x USBC to Lightning (for ipad)
• 1x USBC to micro-USB (for mouse)
• 1x USBA to USBC (if I need to charge 3 things at once
• 1x USBA to micro-USB (to plug my mouse into my laptop)

I also pack my pixelbuds and airpods in the zip up part.

Lastly I have a pouch that carries an adapter and my power plug which I specifically picked because it has the cable to plug into the wall instead of having to have the entire brick plugged into the socket.

Assuming you're coming from US (because that's amazon US link). You most likely can't use your hair straightener. You need a (bulky) power inverter. Better just get a new hair straightener there. You need a UK and a EU adapters, also a travel power strip. You can just plug in all your US devices into the power strip.