Ergonomically designed nursing bottle for ease of use even with the smallest hands. This improved nipple is using a patent pending insert and a 2mm hole at the tip rather than the common cross cut. This prevents leaking while still letting milk to flow freely during the sucking motion of the calf. A newly designed air vent allows enough air in as the calf is drinking, regardless of the drinking speed. This air vent also prevents vacuum build up and bottle collapsing. Due to the hole design, the nipples will last much longer compared to the conventional cross slit design. Nipples are available in Snap-on and Screw-on versions.

High-density polyethylene. No collapsing due to structurally strong round shape. CLEAR NIPPLE is made from a high quality silicone rubber to clearly see the milk flowing inside the nipple. Leak Free: as with a cow, the milk is only released when calves are suckling from the nipple, due to innovative new insert deisgn. Round shape allows for easier cleaning compared to square bottles.

Bottle Type: Vented Bottle. Capacity: 2 Quarts. Bottle Nipple Type: Vented. Item Weight: 0.5 Pounds. Brand: BESS. Best Sellers Rank: #25,230 in Baby. Customer Reviews: 4.3 4.3 out of 5 stars 61 ratings 4.3 out of 5 stars. : B07R8DNVVL. Item Weight: ?8 ounces. Bottle type: ?Vented Bottle. Bottle nipple type: ?Vented. Dishwasher safe: ?Yes. Batteries required: ?No. Number Of Items: ?2. Material Type: ?High-density polyethylene. Item model number: ?15-245. Package Dimensions: ?14.09 x 5.08 x 5.04 inches.