Zombie head
Cooking ring was removed from RuneScape after 8 October 2013, but still exists in-game for those who had obtained it.
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Cooking ring detail

The Cooking ring is made by Right-clicking the uncharged ring and selecting "Charge" within the Cooking skill plot area of the clan citadel, which requires a tier 6 citadel. The ring also requires a Cooking level of 40 to be charged. It gives 150% Cooking experience until you have gained a certain amount of experience, determined by your level and the tier of the Cooking plot, after which it crumbles to dust. A new uncharged ring can only be obtained after this one has been used up.

Tier Experience per level of Cooking Experience at Level 99
1 ~747.93 exp per level 77,510 Exp
2 ~838.85 exp per level 83,046 Exp
3 Untested Untested
4 ~951 exp per level 94,119 Exp
5 Untested Untested
6 ~1007 exp per level 99,656 Exp
7 ~1118 exp per level 110,729 Exp
Combat Stats
NoneRing slotDefenceArmour0
ConstitutionLife points0
Damage--Damage reduction
Accuracy--PvM: 0%PvP: 0%
Style-Style bonuses