1. a small hole made by a sharp object. 2. (Automotive Engineering) a perforation and loss of pressure in a pneumatic tyre, made by sharp stones, glass, etc. 3. the act of puncturing or perforating. 4. (Automotive Engineering) the act of puncturing or perforating.
The size of the bag depends on the size of the machine you have. If you have a small machine, you get a smaller bag. My machine is a 'medium' sized one, and my bag lasts approximately 6 months or so. Bags are not cheap, but they are part of the great filtration on this machine, so I suck it up (pardon the pun).
Mascara is one makeup product in your bag that you want to keep tabs on. It's a breeding ground for bacteria. Most mascaras with a tube and a wand have an antibacterial agent in them that last about 6 weeks making you safe for at least a couple months and likely safe up to 4.