Gin balloons: Get a set of six 65cl Ravenhead gin glasses! Easy to clean: Dishwasher safe. Upgrade: Or, upgrade your deal to get 12 or 24 glasses. Material: Made using 100% thick and sturdy glass. Design: Features a large capacity – plenty of room for ice, lemon and lime. Bowl shape: Helps to trap aromas within the glass for a better taste experience.