Post-beauty trip care: what did you bring?

I'm planning to get beauty treatments in Korea and was thinking of bringing some aftercare products from Japan. For those who have actually done this, what did you prepare? Cooling sheets, silicone sheets, soothing gels... there are so many options, and I'm unsure which ones are truly helpful.

Since I have sensitive skin, I'm leaning towards using products I'm already familiar with, especially for the first few days after the treatment. I know I could probably buy them in Korea, but I'm still a bit anxious. For those who have been through this, did you bring more items from Japan or buy them locally in Korea?

Also, what was your experience like with storing products during the flight or at the hotel? I'd really appreciate any advice from those who have experience!