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That's because I now thoroughly regret passing on the Dragon Quest "Smile Slime" mugs--here's the regular one, and here's the one bearing the grinning visage of a liquid metal slime--that Square Enix offered for sale a couple of years ago. At the time, these vessels could be picked up for just $20 or so, while today they go for more than $40.
Anyway, these three-inch-by-three-inch "yurayura" (that's a Japanese onomatopoeia for “swaying,” “wavering” or “wobbling," according to crunchyroll.com) glasses potentially are less practical than the above-mentioned mugs--after all, I drink many cups of coffee each day, while I only drink wine (which is the liquid I'd most likely pour into these glasses) a couple of times per week--but I'm OK with that as they'd still be cool to own and even show off now and then.
They're pretty darn cheap, too, when all things are considered--with a single glass costing just 840 yen, which translates to about $7, if pre-ordered via amiami.com. (They'll supposedly start shipping in early July, so don't wait too long if you want to nab a couple.)
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I'm also giving serious thought to buying one or more of the "Smile Slime" silicone ice trays that are being sold by amiami.com, too. I don't know about you, but I think 870 yen (again, around $7) is a small price to pay for something that's going to allow you to fill your drinking glasses with slime-shaped ice cubes.