I am in a hotel right now as my first time traveling with peptides. I bought this from Amazon and the freezer packs lasted the entire 6 hours from my house to the hotel and were still frozen and solid. I had it in my carry on and TSA never blinked or asked me to remove it. In the hotel I put it in the fridge. https://www.amazon.com/dp/B0CLC8YF6F?ref=ppx_yo2ov_dt_b_fed_asin_title