What aftercare items do you bring for home care?

Hi everyone! I'm Gita from Indonesia, and I'm planning a trip to Korea next month for a small treatment. I've been researching aftercare and am a bit confused about what to pack for recovery at the hotel.

I'm planning to bring a few things from here, but I'd like to hear from those of you with experience—what kind of cooling mask should I bring? Some say it's good to buy there, but I'm worried about it expiring or being hard to find in convenience stores.

And about the silicone sheet and soothing gel, are they really necessary? Or can they be replaced with other products that are easier to carry? I'd also like to know how many days I actually need to use them regularly. Thanks to everyone who's willing to share their experiences! 🙏