SEQUHITKU 17 Pack Travel Pouches for Toiletries,TSA Approved,Travel Size Portable Containers,Stand Up Pouch,Refillable Travel Accessories for Shampoo Conditioner Lotion Soap Liquids (B-17pcs)

I use the flat plastic bottles in the link below. I just fill them about half full so they don't have a lot of pressure on them if pressed down on in my luggage. https://www.amazon.com/dp/B0BBCFVHGM