Poppers Flip Top Cap WYFF’R GRAY – This invention from the USA will certainly inspire you. A lid that can be easily opened and effortlessly closed with one hand. So you are well prepared for the right moment and you never have to look for a lid again. Poppers are less likely to be emptied by mistake. The lid is easy to open and effortless to close with one hand. The grey version of WYFF’R is suitable for all square 25ml bottles from the manufacturer Lockerroom.