Extreme durability and versatility may make the Pura Kiki Infant Bottle (Est. $16 for one 11 oz. bottle) worth its relatively high price for some. Made from anti-bacterial stainless steel, the Pura Kiki includes no plastic, which is sure to please eco-conscious parents who want something more lightweight and rugged than glass. Experts say the bottle is a breeze to clean and assemble, but it can be uncomfortable to hold without an optional silicone sleeve (Est. $9) since it can become very warm or cold to the touch. Pura Kiki bottles can convert to sippy cups or snack containers with different spouts or lids. They're also compatible with several brands of nipples. However, some reviewers say it can be tricky to get a tight enough seal between the cap and nipple to completely prevent leaks, and painted versions of the bottle may chip.
The Kid Kanteen Baby Bottle (*Est. $17 for one 9 oz. bottle) boasts the same durable, eco-friendly appeal as the Pura Kiki. Its food-grade stainless steel doesn't absorb tastes or smells, and the simple, wide-neck design makes for easy washing and assembly. Reviewers report no problems with leaks, and most like the wide, vented nipple that's designed to mimic breastfeeding and resist nipple collapse. But unlike Pura Kiki bottles, Kid Kanteens aren't compatible with other brands of nipples. They can become snack cups or big-kid water bottles, but aren't compatible with sippy cup spouts. They also lack any sort of silicone sleeve that would make the bottles comfier to hold.
OrganicKidz (*Est. $16 for one 9 oz. bottle) says its single-layer stainless-steel baby bottles are easier to heat and cool, and a nifty stainless travel cap doubles as a snack container and a 2-ounce measuring cup. Like Pura Kiki bottles, these can become sippy cups with a different cap and they're compatible with several brands of nipples. However, some reviewers complain that the painted designs wear off too easily, especially when the bottles aren't hand-washed.