Absolutely! There are lots of options for a makeshift popsicle mould. Drinking glasses, shot glasses, mason jars, muffin tins. All you need to do is pour the mixture into the makeshift mould and place the popsicle stick in. Freeze and enjoy! If the stick is giving you trouble staying upright, you can cover the top of the glass/jar with foil and pierce the stick through that. You can also forgo the stick and just eat the frozen treat with a spoon.