Soft Drink Mixer Cap

More Fizz! No Mess!

Replacement bottle cap with a built in reservoir for holding flavour syrup. One problem with making your own soft drinks using typical consumer grade carbonation appliances is that as soon as you put the flavour syrup into the newly carbonated water, it ellicits vigorous bubbling, letting out a lot of the precious gas you just put into the water and sometimes, creating a mess as the mixture fizzes over. I designed these caps to hold the required quantity of syrup so that as you pour in the syrup, you're already securing the cap on top. As a result, you lose less gas and generally never have the problem of the drink fizzing over and spurting all over your kitchen.

The large size holds about 64mL and the smaller one about 34mL as printed, although once you seal it with epoxy, you'll probably lose 1-2 mL. These amounts are about right for the large and small size bottles sold by the maker of my particular carbonation appliance. You can see it in the attached pict