bkr bottle cap for straws 250ml/500ml

Custom bkr straw cap, designed for use only with bkr soft silicone straws. It's made from the same BPA-free, phthalate-free food-grade polypropylene as the lids you already know and love, and features a clear silicone valve to keep your straw in place.

To use it, you first screw the cap on the bottle and then insert the straw through the transparent silicone valve. This cover is splash proof. It will keep your water in place during light turbulence on a flight to some amazing place, but if tipped over in your bag, some water may leak out. It's top shelf dishwasher safe, like everything we make, and the valve is removable so you can wash all parts thoroughly to avoid contamination.