4 Oz Starter Set

By 5 Phases

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A glass baby bottle fully encased in BPA-free plastic sleeve offers the health benefits of glass and the safety benefits of plastic.

  • Starter kit includes: One 4 oz. fully assembled hybrid glass baby bottle, bottle cap, two 4 oz. replacement glass inserts with silicone plugs, two vented silicone nipples (0-3 months)
  • Plastic sleeve is BPA-, phthalate-, and PVC-free
  • Removable and interchangeable glass insert
  • Microwavable and dishwasher safe
  • Third party tested and complies with all specifications and regulations required in the US, EU, and Canada
  • Warning: Glass bottles can break with sudden changes of temperature and can shatter in plastic sleeve if handled with force
  • Made in China
  • Dimensions in packaging: 8.8" x 2.95" x 6.54"
  • Weight: 0.37 lb.

2 Reviews (5 out of 5 Grommets)

Sorted by Rating

Excellent Idea






I loved it. I was skeptical at first, but it exceeded my expectation. I only wish that it came with 3 nipples to match the 3 glass bottles.

2 Item(s)

5 Phases - Hybrid Baby Bottles

About 5 Phases

Best of both worlds

Like all moms, Christine Barlow wanted nothing but the best for her babies. When it came to bottle feeding, she worried about plastic, so she opted for non-toxic, easy-to-clean, and recyclable glass instead. However, there was one drawback—glass can break. That’s why Christine created a hybrid bottle so every baby can have the best of both worlds.

5 Phases offers all the health benefits of glass, plus the durability of plastic. The unique design features a glass bottle fully encased in a see-through, BPA free sleeve.

With 5 Phases, you and your little one can raise a glass bottle without worry.