If I am travelling by any means other than car I always like to take care that my lotions and potions don't leak out all over my nice clothes. To avoid this I will put shampoo and conditioners in a large, plastic zip-lock bag. That way if they leak I won't find my nice top all covered in shampoo or conditioner!
And as well as taking the bags full of things I always take a handful of different sizes for bringing things home (Remember I do like to bring things home from far away places!).
The one jar I bring with me everywhere is my coconut oil which I put in a zip lock bag and wrap this in bubble wrap - better be safe than covered in coconut oil!