In creating a sleeve for Thinkbaby bottles, we looked carefully at the solutions on the market. We wanted a material that would provide maximum insulation and protection. But...we also wanted to see how eco-friendly that we could make the sleeve.
Our investigation took us to our friends at Patagonia. Patagonia largely pioneered the use of Limestone-based neoprene to replace traditional neoprene for their wetsuits.
Thinkbaby's sleeves are made from Limestone. They feel just like traditional neoprene. We have made them in 4 colors. They will not only protect the bottles but will provide significant insulation.
Please note that we made them fit tight, so they cannot be easily removed by a toddler.