That, good sir, is a Guyot Gription. Made back in the day by the same people that make all those awesome stainless steel water bottles we all love, this thing fits any normal wide mouth bottle and adds a handle with a spill proof drinking port. Basically when you push the orange bit down, it opens the lid enough to drink from. It is spring loaded so when you release it, it seals right back up. One of my biggest pet peeves was having to constantly remove the lid from my nalgene to take a drink, worry about knocking the lid off the table or dropping it, or spilling the contents of my nalgene. I drink out of one every day, so as you can imagine I have had plenty of opportunities to test this theory, and I have at least two different keyboards that learned the hard way that an uncovered nalgene bottle spells certain doom for anything on my desk.