We recommend freezing milk bags upright to maximize capacity!
1. Place frozen milk into Stash Cooler.
2. Continue layering milk into the Stash cooler until it is filled. Please ensure that the lid sits flush.
3. Seal cooler and affix shipping label (if applicable).
Milk Stork Stash coolers do not have an activation button. Our coolers work with high performance vacuum insulated panels that will maintain the frozen temperature for up to 96 hours.