  We report the results of our pilot millimeter observations of periodic maser
sources. Using SMA, we carried out 1.3\,mm observations of G22.357$+$0.066 and
G25.411$+$0.105, while ALMA 1.3 mm archival data was used in the case of
G9.62+0.19E. Two continuum cores (MM1 and MM2) were detected in
G22.357$+$0.066, while 3 cores (MM1 -- MM3) detected in G25.411$+$0.105.
Assuming dust-to-gas ratio of 100, we derived the masses of the detected cores.
Using the $^{12}$CO (2-1) and $^{13}$CO (2-1) line emission, we observed gas
kinematics tracing the presence of bipolar outflows in all three star-forming
regions. In the cases of G22.357$+$0.066 and G9.62+0.19E, both with similar
periodic maser light curve profiles, the outflowing gas is seen in the
north-west south-east direction. This suggest edge-on view of the 2 sources.
G25.411$+$0.105, with a contrasting light curve profile, show a spatially
co-located blue and red outflow lobes, suggesting a face-on view. Our results
suggest that orientation effects may play a role in determining the
characteristics of the light curves of periodic methanol masers.
