PATENT PENDING DESIGN - We take pride in our products and it showsOur premium cocktail mixing glass is designed by our team and filed with the United States Patent and Trade Office. Just search for 'MOFADO CRYSTAL' to see our entire lineup. QUALITY SEAMLESS DESIGN - While cheap cocktail mixing glasses are machine made (with seams) and crack easily or tip over because they aren't weighted properly. Mofado's mixing glasses are handcrafted from high quality, ultra clear lead-free crystal with a thick, weighted bottom to ensure you get the most from your mixing & bartending experience. LEAD FREE CRYSTAL + PREMIUM CONSTRUCTION - Crafted from premium 100% lead free crystal. No more spilled drinks or cracked/broken glasses... Mix with confidence knowing you are using premium bar quality products that are made for mixing quality drinks. MIX LIKE A PRO - With your premium mixing glass, jigger, muddler and strainer you'll be creating, stirring, straining & serving like a professional mixologist. Whether it's Whiskey, a Martini, Manhattan or an Old Fashioned, you'll be creating, straining, & serving like a seasoned bartender. Mix with confidence knowing that you are using a quality product made specifically for what you are doingMixing professional quality drinks for friends, family and yourself of course! 100% SATISFACTION GUARANTEED - If you're not completely satisfied with your cocktail mixing set, return it within 30 days for a full refund