Double is an Item that can be found within common locations, including choice enemy Camps, given by Spouses, and rarely as a reward from Seasonal Festivals. Upon being picked up, whenever the player collects Berries their current Tractor's cooldown timer will be reduced by a certain amount based upon the value of the given Berry.
Compared to other means of recharging Tractors, Double Cream is among the fastest, due to having an immediate effect. In this regard, it is only outcompeted by the Recharge Mushroom, due to it providing a full unit of charge instead of a small amount. Unlike this Home Improvement, Double Cream is never permanently consumed however. However, it does rely on the collection of other things, specifically Berries. Furthermore, Double Cream yields a relatively low amount of additional charge per each individual Berry collected. Because of this, Double Cream might not be seen as the best Item to recharge Tractors with.
The following is a list of possible Items that can affect Double Cream: