Filled with water, completely submerged so when the cap was secured a minimal amount of positive pressure was created.out of curiosity: did You leave the flask empty for engraving? Or did you fill it with something (water, sand, low melting stuff…) to dampen noise and get more impact from your graver handpiece?
Cheers
Ralf
Yup, she does, carries it around empty everywhere she goes just to show it off.still looks good, she'll love this one........................