Keep your drink secure and splash-free with this clever silicone cap from Guyot Designs. The dual-opening design features a smaller sipping aperture that blocks splashes during active adventures, plus a larger fill-through drain so you can top off your water without removing the cap. Made from food-grade silicone rubber that won’t absorb odors or flavors, it’s dishwasher safe and can be sterilized by boiling for complete peace of mind. The flexible design fits most wide-mouth bottlesNalgene, Cyclone, Bison, GSI, and moreand works for both kids and adults. The original spill-proof solution for hikers, paddlers, and anyone who refuses to sacrifice hydration for cleanliness.