Milk Cooling Boxes include: One Milk Cooling Box with a Cooling Engine Ready to Activate Stickers or Tape to Seal the Box Milk Storage Bags Instructions No more pumping and dumping! These breast milk cooling boxes are perfect for parents who want to ship their milk overnight, carry-on, or check as baggage. All you have to do is activate a cooling engine with one push of a button and your milk is now kept at the perfect temperature. The compact and lightweight size of the containers reduces transportation costs. These refrigerated systems cover a temperature range of 2 - 8 degrees Celsius for durations up to 4 days depending on the model. Easily portable, 2-8°C coolers arrive ready to activate. There’s no need to freeze and condition gel packs (or worry about whether gel packs have been conditioned or packed correctly). Return shipping not included. Note: Empty Milk Cooling & Shipping Boxes are shipped with standard UPS Ground shipping. If they need to arrive by a certain date, or are being shipped to a hotel or expedited shipping is required please add a note to your order when you checkout, or contact us. Contact details will be emailed to you upon placing your order. For prepaid company orders, please use your work email address. If you are using a discount code, you confirm that you are authorized to do so. Standard Dimensions L 12.1 x W 7.9 x H 5.1 Inches Inner Dimensions L 8.5 x W 4.7 x H 1.6 Inches/Volume 1.05 liters Weight 4.2 lbs Holds 1 day of milk (approximately 25 oz) Cooling up to 72 hours Includes milk storage bags Large Outer Dimensions L 12.1 x W 7.9 x H 7.4 Inches Inner Dimensions L 8.5 x W 4.7 x H 4 Inches/Volume 2.62 liters Weight 5.5 lbs Holds 2-3 days of milk (approximately 70 oz) Cooling up to 92 hours Includes milk storage bags X-Large Dimensions L 13.9 x W 12 x H 10.3 Inches Inner Dimensions L 9.5 x W 8.7 x H 6.1 Inches/Volume 8.25 liters Weight 11.25 lbs Holds 6-8 days of milk (approximately 200 oz) Cooling up to 87 hours Includes milk storage bags