Right now they have at least one sample available. Looks like they add different products.

Get free samples from Peekage. Click here and download the app. You should get enough coins for the free sample. You can also take quick surveys for coins to claim offers.

Right now you can claim a free sample of Magnak endurance mix.

You can also take surveys to claim more rewards like gift cards. Make sure to add your social media accounts and take the quick surveys for more coins.