A (free) sample or promotional gift given out to promote a product, commonly for cosmetics or food.
スーパーの入口で試供品を配っていたので一つもらった。
They were handing out samples at the supermarket entrance, so I took one.
化粧品の試供品で肌に合うかどうか試してみた。
I tried a cosmetic sample to see if it suited my skin.
試供品を試してから製品を購入する人が多い。
Many people try samples before buying the full product.