A truly great concept that our testers felt was a long time in coming. Thrilled that there was finally an easy way to warm a bottle on the go. The cow print is very stylish and caught everyone’s eye. The packaging, which shows the product off so well got very high marks from our testers. The directions are easy to follow and the whole system is quite intuitive. Parents reported that it takes about 30 minutes to warm up the bottle, but that it stayed warm for up to eight hours! That’s pretty remarkable by any thermal measurement.