Just for fun I did the Maths.

Rougly a 100ml glass of anti-water has 100g of anti-water (assuming same density as normal pure water, which is around 1).

When anti-mater contacts mater it transforms into energy according to E = mc^2^ were E is in Joule and m is in kg.

For 100g of anti-water to turn into energy in this way it also needs 100g of normal mater, so the number is doubled.

Using the rounded 300,000,000 m/s for the constant c, the energy released by the annihilation of a 100ml glass of anti-water (and the matching 100g of normal mater) would be 1.8e+16 Joules, equivalent to around 4.3 Megatons of TNT.

So basically a regular nuclear bomb.

PS: I actually expected it would be much more energy before I did the maths.