Backpack

Katniss's pack with Clove's knife pierced on the front A backpack is a bag, often made of canvas or nylon, to be carried on one's back, sometimes supported on a lightweight metal frame strapped to the body.

The 74th Hunger Games
Katniss Everdeen had possession of one in The 74th Hunger Games. Though, she had to fight over one with a Male from District 9 who eventually got killed fighting for the pack by Clove from district 2. Then Clove threw a knife at Katniss but she was   able to block it with the backpack and gained a knife. The backpack was essential to her survival. It contained one thin black sleeping bag that reflects body heat, a pack of crackers, a pack of dried beef strips, a bottle of iodine, a box of wooden matches, a bit of coiled wire, a pair of night vision glasses (mistaken for sunglasses at first by Katniss, but was later enlightened by Rue), and an empty half gallon plastic water bottle. One immensely bad thing about this pack was that it was bright orange which could easily be seen and proved very difficult to cover up. Katniss realized this and used mud to camoflauge it. Katniss fought for the backpack at the Cornucopia along with some bread (which she ended up dropping) and a three-foot plastic square. This was key to Katniss's survival in the Hunger Games.

Rue's backpack contained an extra pair of socks, a water skin, and iodine; there may have been more at the start of the Games, but by the time she meets Katniss, that's all that was left.

Katniss took Marvel's backpack after she killed him and his backpack had several knives, two extra spearheads, a flash light, a small leather pouch, a first-aid kit, a bottle of water, and a pack of dried fruit. This pack was probably packed by the careers, not a Cornucopia set like Katniss and Rue's packs.

At the feast, there were 4 backpacks laid out on a table near the Cornucopia. Each were marked with a District number and contained what the remaining tributes needed most. One for District 12, 11, 5 and 2. The backpack marked with a "12" was small compared to all the other backpacks, because it only contained the medicine needed to help Peeta's leg infection. The backpacked marked with a "2" is believed to have contained body armour, used by Cato in the final battle. It is unknown what the other backpacks contained at the feast, although Katniss assumed Foxface's had food.