From KenTiki:

"This pair of mai tai glasses features stacks of headhunter skulls and tikis. It is made to match the 'Shaking Things Up!' cocktail shakers and goes with either one or both because it features designs from both and matching colors. These are nominally 15oz glasses but actually hold about 13.5oz.

Original vintage-look graphics echo the earliest days of tiki cocktails and has a distressed look to simulate age and use. These graphics printed on the glass with commercial grade glassware inks so they are durable and will hold up to heavy use."