From BruMate’s Website: The MargTini is made for cocktails with personality. Our elegant, two-in-one MargTini tumbler was designed to mimic margarita and martini glasses with a slim rim for salt and easy sipping, has our BevGuard™ insulation to keep your drinks the perfect temperature and is constructed with durable stainless steel so you can sip in style in places glass can't go.