Regatta Black Insulated Vacuum 0.5L Leak-Proof Flask, Sports Direct. The Insulated Vacuum Flask 0.5L from Regatta is an on-the-go must-have. Whether you're on a hike, at the office or enjoying outdoor activities, the double-walled construction ensures excellent heat retention. The vacuum insulation maintains your drink's temperature, keeping hot drinks hot and cold drinks cold for hours. The push button release provides easy access, and the leak-proof lid prevents spills. What's great about the vacuum flask is that the lid can be used as a cup, providing versatility and convenience. 0.5 litre capacity Double walled for excellent heat retention Vacuum insulated to keep drinks hot or cold Push button release for easy pouring Leak-proof lid can be used as a cupLooking for alternatives to stores like JD Sports, eBay, SHEIN, ASOS, Next, Best Choice UK, Very, Decathlon UK, Argos, schuh, Temu, BuyBetter, or Nike Official? Discover our unique selection.