@Imgonnatrythis I seal up the zip-lock top except for about an inch in the middle. Then I push in toward the unsealed bit so it makes a round opening, put my lips against it like I'm giving it a big kiss, inhale deeply, and immediately seal up the opened bit while continuing to inhale. (Those of a certain age may remember employing the same technique on zip-lock bags of a certain dried herb.) That gets most of the air out; not all, but enough that things mostly don't float.
@Imgonnatrythis I seal up the zip-lock top except for about an inch in the middle. Then I push in toward the unsealed bit so it makes a round opening, put my lips against it like I'm giving it a big kiss, inhale deeply, and immediately seal up the opened bit while continuing to inhale. (Those of a certain age may remember employing the same technique on zip-lock bags of a certain dried herb.) That gets most of the air out; not all, but enough that things mostly don't float.