First Time Jug Owner

My first ever Waifu Jug arrived today, but I got some questions 1.) How many scoops is recommended for a jug? 2.) Do the jugs not include sample packets? 3.) Do the jugs need a layer of protection?

My first ever Waifu Jug arrived today, but I got some questions 1.) How many scoops is recommended for a jug? 2.) Do the jugs not include sample packets? 3.) Do the jugs need a layer of protection?