Tall enough for ice and three layers
Capacity is the first choice you make and straight away the most important one. A Sex on the Beach is roughly fourteen centilitres of liquid, and ice fills the glass to almost the rim on top of that. So count on at least 33 cl, with 36 to 40 cl as a comfortable standard. The Islande by Arcoroc comes in 33 and 36 cl, the Lima by Chef & Sommelier in 40 cl, and if you want to pour really generously you end up at the Diamond of 47 cl or the Cidra of 55 cl. Anything under 31 cl only works if you go easy on the ice.
The shape can be straight or slightly flared, as long as the glass is taller than it is wide; a narrow, tall column shows the colour gradient best because the transition stretches over more centimetres. After that, choose on material. Tempered glass, such as the Norvege by Arcoroc, takes more knocks and is the choice for a terrace or beach bar. Duralex Picardie is tempered as well and stacks on top of that, which helps behind a bar with little shelf space. If you want thinner, more elegant glass, look at the ranges from Onis and Bormioli Rocco.