I always mark the package as a gift- so the person doesn't have to pay extra taxes on it when it gets there and then I usually describe the contents as "cosmetics samples." For the value, I usually just put $3-$5. Make sure you wrap everything really good in bubble wrap.
Been lucky so far- eveything has gotten to where it needs to go. Hope this helps you.
Inmy experience, you can declare the decants to be whatever you please (other than "glass vials of potentially flammable liquids"). I have sent them to Australia as "Men's wallet", Finland as "plastic necklace" and Canada as "baseball cards". If the people at the counter get curious, feeling the envelope and what not, say they are lipsticks . The only important part is "gift" and to keep the dollar value very low.