LeoVegas
Up to £100 cash + 50 spins on Book of Dead
Trust Index 8.9/10 · 12h payout
Push Gaming · 2018Jammin' Jars — what every player should know
Overview
Jammin' Jars is Push Gaming's high-volatility cluster-pays slot on an 8×8 grid. Match fruit symbols in clusters of 8 or more and they vanish, dropping new symbols to create cascades and stack multipliers that can balloon into genuinely dangerous territory.
How it plays
Bet between £0.20 and £100 per spin. Hit frequency is sparse — long droughts between clusters are normal at this volatility. When clusters land, multipliers stick to the grid and accelerate with each cascade. Free spins trigger on 4 or more jar scatters and activate a locked-multiplier mode where the grid works harder in your favour.
The bonus round
Land 4+ jar scatters to enter free spins. During the bonus, multipliers lock in place across cascades, meaning each tumble compounds the previous one. A single extended run can stack multipliers into four figures. Retriggers are uncommon but possible, extending your time in the multiplier furnace.
Who it's for
High-volatility chasers who can endure 100+ dry spins hunting a single explosive cascade, and who have the bankroll to weather variance in pursuit of a 5,000x+ hit.
Avoid if
You dislike long losing streaks, play sessions under 30 minutes, or need steady hit frequency to stay entertained — Jammin' Jars can feel dead for extended periods.
Where to play Jammin' Jars — casinos we've audited
Operators below carry Jammin' Jars in their library and have a current Trust Index score. Claim links open the operator's verified welcome bonus.
Visit LeoVegas
Mr Green
100% up to £100 + 200 free spins
Trust Index 8.7/10 · 24h payout
PlayOJO
50 wager-free spins on Book of Dead, winnings paid as cash
Trust Index 8.8/10 · 8h payout
Casumo
100% up to £25 + 20 free spins
Trust Index 8.3/10 · 12h payout
BetUK
Bet £10 get £30 in free bets
Trust Index 8.2/10 · 12h payout
Frequently asked questions
How do multipliers actually work in free spins?
Each cluster that lands adds a multiplier to the grid. On the next cascade, all wins are multiplied by the accumulated total. A three-cascade free-spins run with multipliers stacking 2x, 3x, 4x creates a 24x multiplier on the final win.
Can you trigger free spins during free spins?
Yes. Landing 4+ scatters again during the bonus adds extra spins and resets the multiplier lock mechanic, extending your time in the potentially high-paying state.